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Iron Meteorites For Sale

iron meteorites for sale

Medium sized Sikhote-Alin exhibiting thumbprints, and fantastic shape.

The most visually intriguing of meteorites are also the heaviest and the most recognizable. They come to us from large asteroids with molten cores that once orbited the sun between Mars and Jupiter. Extremely slow cooling of those cores, over millions of years, allowed nickel-iron alloys to crystallize into fantastic geometric structures known as Widmanstätten Patterns. Much like snowflakes, the pattern of every iron meteorite is unique. Catastrophic collisions within the Asteroid Belt shattered some asteroids, sending pieces in all directions. Some of them eventually encountered Earth’s gravitational pull, resulting in a fiery journey through our atmosphere at speeds up to 100,000 miles per hour. Superheated to thousands of degrees Fahrenheit, the surfaces of these fragments melted to form beautiful sculptural indentations called regmaglypts or thumbprints — features that are unique to meteorites.

Our catalog of iron meteorites for sale is presented here, in alphabetical order. Click on any image for additional photographs. Specimens are fully guaranteed and we pride ourselves on outstanding customer service; contact us for additional information. We hope you enjoy this look at the remnants of the hearts of ancient asteroids.

 

Agoudal

Agoudal
Iron, IIAB Found in Morocco, 2000 In 2000, small pieces of an iron meteorite were collected near Agoudal in the High Atlas Mountains of Morocco. Known also by its provisional name, Imilchil, the meteorite was classified as an IIAB iron. After a small specimen was sold to a dealer in Errich, who recognized it as an authentic space rock, hunters returned to the find site in 2012 and uncovered a considerable amount of meteorites, most of them small pieces found on the surface or buried a few centimeters deep. Individuals display a beautiful natural patina and, when cleaned, some reveal orientation and flow lines with tiny regmaglypts. The vast majority of recovered pieces are too small to cut in the laboratory, but a single, unusually large mass produced remarkable sliced specimens with a rare occurrence called recrystallization. This is a consequence of, what we believe to be, a secondary asteroidal collision that reheated the material. An interesting desert iron with attractive shapes and rich natural patina.

Baja California

Iron, IIIAB Baja California, Mexico, Classified in 2020 The Baja California meteorite was found near a ranch in Baja California, Mexico before July of 2017. After being analyzed by research specialists at the University of Arizona, it was officially submitted for classification as an Iron, IIIAB. This class of iron meteorite is often used by scientists investigating the core crystallization in asteroids and similar celestial bodies. Some of the largest irons ever found are IIIAB irons, like Cape York, Chupaderos, Morito, and Willamette. Recent research from Jamshid Hassanzadeh, Alan E. Rubin, and John T. Wasson reveal a link between mesosiderites, main group pallasites, and IIIAB irons. The 10 kilogram single individual displayed weathered fusion crust with pits over the entire surface, and an unusual cavity where an inclusion ablated away as the meteorite hurtled through our atmosphere. Baja California features an absolutely eye-catching interior and exhibits some schreibersite, a mineral found in nickel-iron meteorites. Some Baja California slices will display delicate ribbons of schreibersite running alongside pinched ends of taenite, accented by fine grains of sulfides and raisin-like inclusions of troilite, a rare mineral. Aerolite Meteorites co-owns the mass and was involved in its classification.

Balambala

Balambala Iron, IIF Kenya, 2018 Goat herders in the North-Eastern Kenyan region where this intriguing meteorite comes from call it Dhagax Bir, which means “metal stone” in the local Somali dialect. Local residents have known of the mysterious ferrous stone for at least 50 years; a 60-year-old woman in the area recounts that she’d known about it since she was 10 years old. Balambala is unique; the single mass was shaped like a shield and is covered in regmaglypts. Classified as a rare IIF iron, Balambala and other meteorites of this type are rich in nickel and contain high levels of gallium, germanium, copper, and cobalt. The elemental abundance in IIF irons are consistent with formation in planetesimal cores, and meteorite scientists believe these irons may have formed alongside PES pallasites (Eagle Station Pallasites).

Campo del Cielo

Chaco and Formosa, Argentina Recommended for classification as an Iron, IAB-MG Few cosmic impacts during our planet’s tumultuous history can have generated such measurable and far-reaching an influence as the gigantic Campo del Cielo meteorite fall. It is aptly named, as Campo del Cielo is Spanish for “Field of Heaven,” or “Field of the Sky,” and it must truly have seemed that the sky was falling at the time of impact. About 5,600 years ago dense, nickel-iron cosmic debris rained down over what are today the Argentinian provinces of Chaco and Formosa. It must surely have seemed like the end of the world to any early peoples unlucky enough to have been in the vicinity. The incoming meteoroids (the scientific term for a potential meteorite before it makes contact with the ground), likely had a long and shallow flight path, as evidenced by the lengthy fall zone, or strewnfield. The larger masses formed craters and over twenty have been recorded. Although early peoples likely collected some of the metallic fragments from the surface — perhaps using them as tools or weapons — the first recorded information about this historic meteorite comes from 1576 when the invading Spanish noted the existence of abundant natural iron in Chaco province. Some large masses of Campo del Cielo remained on the surface, while others were buried over time. Some of those were recovered from significant depths — 12 feet or more — with the help of professional metal detectors. On January 1, 2008 Argentina implemented a law prohibiting the exportation of meteorites. All of our Campo del Cielo specimens were legally obtained prior to the enactment of that law. We do not trade in illegally exported meteorite specimens.

Campo/Las Palmas

Unclassified Iron In 2006, a meteorite hunter originally hoping to extend the known boundaries of the Campo del Cielo strewnfield explored far into Formosa Province in Argentina, where he discovered a small and previously unknown meteorite strewnfield 200 miles north of Campo del Cielo, near the town of Las Palmas (“The Palms”). The zone produced about 300 kg of small, beautifully-regmaglypted and highly sculptural iron meteorites. These irons were assumed by many researchers to be examples of the already-known Campo del Cielo meteorite, even though the strewnfields are separated by 200 miles and the Las Palmas strewnfield is perpendicular to the Campo del Cielo strewnfield. Aerolite Meteorites attempted to have the “Las Palmas” meteorite classified three separate times by three different academics and, each time, a different conclusion was reached. One highly respected researcher said he believed Las Palmas to have the same or similar structure and classification as Campo del Cielo, but stated that it was: “On the strange end of Campo.” It is highly unlikely that two meteorite strewnfields that are perpendicular to each other and separated by 200 miles could represent the same fall, although the falls could have originated from the same parent body, but fallen at different times. The Las Palmas individuals are very well preserved, with multiple, fine, small regmaglypts, and most uncleaned pieces display clear remnant fusion crust. These characteristics appear different to the majority of Campo del Cielo finds. “Las Palmas” is not an official name and it is not listed in the Meteoritical Bulletin database. It is, however, without any doubt, a genuine iron meteorite.

Canyon Diablo

Iron IAB-MG, Found in United States, 1891 Meteor Crater is the most recognizable and best-known meteorite feature on Earth and is visited by many thousands of tourists annually. Recent studies estimate its age at 61,000 years. It was also the first proven meteorite crater. Geologist, miner, entrepreneur, and visionary Daniel Barringer was convinced the feature was a meteorite crater, defying the popular opinion of so-called experts at the time. Barringer spent a fortune searching for what he believe to be a giant meteorite buried under the crater. He was right about the crater, but wrong about the meteorite. We now know that the mass fragmented and part of it vaporized upon impact. But Barringer’s insight and determination gave him an honored place in meteorite history and the site is still sometimes referred to as Barringer Crater. Another key figure in space rock history, innovative meteoriticist H.H. Nininger, conducted many years of important research at the site and also opened the world’s first private meteorite museum alongside nearby Route 66. Meteor Crater was studied by legendary geologist Gene Shoemaker and some of the NASA Apollo astronauts were trained there prior to their moon missions. Canyon Diablo is a steep-sided ravine some distance west of the crater and meteorites found around the crater take their name from it (the convention being that meteorites are named after the nearest town or geographical feature to their fall location and they could hardly be named after the crater that they, themselves, formed). Meteor Crater is internationally recognized as a scientific site of unique importance and meteorite collecting there is no longer permitted. Older specimens that were found during the first half of the 19th century, or earlier, when collecting was still allowed are, therefore, highly desirable.

Dronino

Iron, ungrouped Found in Russia, 2000 The Dronino strewnfield is situated close to the Russian town of Kasimov, founded in 1152. In this decidedly rural setting, the archaic pastime of wild mushroom hunting is still practiced. And so it was that the Dronino iron meteorite was accidentally found in the year 2000 by Oleg Gus’Kov, a man in search of earthbound fungi. Extensive work at the site by professional meteorite hunters followed and it was the site of a third season episode (“Dronino”) of TV’s series “Meteorite Men.” Due to the number of masses found, and their size and disposition, it has been suggested by expert hunters that Dronino is a buried impact site (soil crater), though no definitive evidence is currently on record.

Gebel Kamil

Iron, Ungrouped Found in Egypt, 2009 While searching for ancient Egyptian settlements on Google Earth, Italian scientist Vincenzo De Michele, a former curator of the Milan Natural History Museum, accidentally discovered a new meteorite crater! An expedition to the remote site determined that the crater was, indeed, of meteoritic origin and probably about 5,000 years old. 800 kilos of material was recovered by academics and much of that is curated at the Egyptian Geological Museum in Cairo. Despite languishing in the deep desert for fifty centuries and acquiring a bronze-colored patina, Gebel Kamil irons are very well preserved due, no doubt, to the area’s dry climate. Its angular shapes are typical of crater-forming irons, but the “lizard skin” texture is unique to this meteorite. When sliced open Gebel Kamil reveals a surprising interior, a brilliant mirror finish when polished and no Widmanstätten pattern! Gebel Kamil is an ungrouped iron, meaning it does not fit into any existing classification.

Gibeon

Iron, IVA Found in Namibia, 1836 The Gibeon iron, from the Namib Desert, has long been a favorite of collectors because of its sculpted appearance, attractive etch pattern, and lovely, rich desert patina. Some years ago, Gibeon meteorites were relatively common in the marketplace, but a ban on collecting in, and exporting from, Namibia has made these excellent irons almost impossible to obtain. Gibeons make outstanding display pieces and this desirable iron continues to increase in value as available pieces become more and more rare.

Henbury

Iron, IIIAB Found in Australia, 1931 The Henbury iron was discovered in 1931 and is associated with fifteen impact craters in central Australia. Henbury irons display an attractive desert patina — a reddish-crimson color slowly acquired over hundreds of years. The crater field is now a protected area and collecting is prohibited. As a result Henburys have all but disappeared from the marketplace. We filmed an episode of our TV series “Meteorite Men” at Henbury in 2010.

High Island Creek

Iron, IIIAB Find: April 2011 The High Island Creek is a rare U.S. iron (IIIAB) found by a couple, Bruce and Nelva Lilienthal, in 2011. The meteorite had been picked up by Bruce from one of his fields and set aside, with other unusual rocks, for Nelva’s garden. It was Nelva who suspected it might be a meteorite, having seen articles about them, and who made the calls and sent letters and to try and get it identified and classified. In 2013, the Lilienthals sought the help of Calvin Alexander, curator of meteorites at the University of Minnesota, who would eventually classify the iron. High Island Creek is notable not only for being a U.S. iron, but also for its gold (Au) and iridium (Ir) content. The only other IIIAB iron that resembles its composition is the al-Ghanim iron that fell in Saudi Arabia.

Mundrabilla

Iron, IAB-ung Found in Australia, 1911 A remarkable Australian iron, Mundrabillas are known for their unusual zoomorphic shapes. During its long flight through our atmosphere, soft areas of the meteorite melted away leaving behind a weird and wonderful animal-like resemblance. We lovingly refer to them as alien animal crackers. Mundrabilla displays an attractive etch pattern and is found in a very remote part of Western Australia, known as the Nullarbor Plain. It is such an unusual iron meteorite that it does not fit with any know class as is described as ungrouped (UNG). All specimens are as-found, with an orange/ochre patina. All of our Mundrabilla meteorites have legal export permits from Australia.

Muonionalusta

Iron meteorite, IVA Arctic Circle, near Muonionalusta Island, Sweden, first known 1906 Meteorites found in remote and nearly inaccessible locales seem to hold a special allure for hunters and collectors alike. Muonionalusta is no exception. The fall site lies north of the Arctic Circle in Sweden and the meteorites found there are so ancient their fall pre-dates at least one ice age. Long-vanished rivers of ice carried meteorites with them for a time, but left the heavy irons behind as they melted, mixing them in with a flotsam and jetsam of mismatched transported rocks known to geologists as terminal moraine. Having been casually “dumped” by retreating ice, the locations and depths at which Muonionalusta meteorites are buried are, therefore, completely random. Conventional meteorite hunting techniques must be thrown out the window by those in search of this ancient and puzzling iron. The Muonionalusta strewnfield was featured in two episodes of the television series Meteorite Men. Much like the Gibeon iron meteorite from Namibia, Muonionalusta displays a beautiful Widmanstätten etch pattern after preparation in the laboratory.

Nantan

Iron, IAB-MG Guangxi, China The Nantan meteorite is a main group iron, first recorded in Guangxi, China in 1958. Individual pieces typically display a rich and attractive bronze patina. Initially classified as a IIICD in the year 2000, it was reclassified as a IAB-MG in 2006. There is some speculation that Nantan irons may be remnants from a significant fireball witnessed in Guangxi Province in the year 1516 which — according to some sources — showered a large area with iron meteorite fragments. The “Meteoritical Bulletin,” however, does not list Nantan as an observed fall, and an association with the 1516 fireball has not yet been proven.

Northwest Africa 6565

IIAB iron meteorites offer scientists unique insight into the crystallization history of asteroidal cores–they are the largest magmatic iron meteorite group. Typically, these iron meteorites are dominantly composed of nickel-iron metal and are thought to be crystallized from a melt. The minerals these meteorites are composed of offer clues about the processes that took place when these asteroidal cores formed.

Odessa

Iron, IAB-MG Found in Ector County, Texas, United States in 1922 The Odessa meteorite impact crater is located in West Texas and is recognized as a National Natural Landmark by the National Park Service. It’s estimated to be about 63,500 years old. The crater was found by a rancher who rode his horse out looking for a lost calf and stumbled upon the crater. The Odessa crater was verified as a meteorite impact crater because a geologist noticed an odd paperweight in the mayor’s office. The paperweight was a rock that had come out of the center of the crater and was later confirmed to be a meteorite. We are pleased to present Odessa individuals and slices. The specimens offered are out of a very old collection. The exteriors are well regmaglypted and feature a natural bronze patina. The interior of Odessa displays an absolutely eloquent Widmanstätten pattern and some with eye-catching inclusions.

Pierceville

In 1953, Dr. Nininger reported the following: "In September, 1952, Mr. Orf visited the American Meteorite Museum on U.S.66 west of Winslow, Arizona, on his return from a visit to Kansas. He brought with him several pieces of 'iron ore' which he wished to have tested for possible meteoritic characteristics. Casual inspection indicated that the specimens were from an oxidized metallic meteorite." After subsequent research, Harvey and Addie Nininger visited the find site and located a buried mass, using a mine detector. "We were," he writes, "given permission to excavate and proceeded to uncover a broken mass of oxide which together with the scattered fragments weighed 230 lb."

Saint-Aubin

Iron, IIIAB-UNG Found in Aube Champagne, France, 1968 Saint-Aubin is a rare European iron meteorite that was first found in France in 1968 by farmers plowing a field. It is an ungrouped octahedrite, meaning it does not fit into any existing iron meteorite class. Months of laboratory work were required to prepare the mass from which these slices were taken. It has not just been cut, polished, and etched, but also meticulously stabilized by an expert in meteorite preservation and preparation. As noted in the The Meteoritical Bulletin, Saint-Aubin can display shock features, Neumann lines, iron sulfide nodules, and extraordinary schreibersite needles up to 6 centimeters in length. Schreibersite is a rare nickel-iron phosphide mineral that — apart from a single location in Greenland — is not found on Earth, but only in meteorites.

Seymchan Siderites

Pallasite, PMG Found in Magadanskaya oblast', Russia, 1967 Seymchan was found in Russia in 1967 in the bed of a brook. The triangular mass discovered was huge, weighing nearly 800 pounds. Researchers originally classified Semchan as an iron (IIE), until 2004 when new material recovered from the site was found to contain lovely olivine crystals. Thus, we now have the best of both; collectors can enjoy Seymchan pallasites as well as Seymchan siderites, which display an exceptionally attractive etch pattern. Very few transitional Seymchans exist, clearly showing the core to core/mantle boundary of this amazing long dead asteroid. We are pleased to present them, along with gemmy pallasites, and alluring siderites here.

Sikhote-Alin

Iron, IIAB Witnessed fall in Russia, February 12, 1947 The Sikhote-Alin meteorite is a famous witnessed fall that landed in Russia at 10:38 am on February 12, 1947. That morning an estimated 70-ton mass blasted through Earth’s warm atmosphere at speeds of 25,000 mph or more. During its flight, experts estimate the surface of the Sikhote-Alin meteorite reached at least 3,000 degrees Fahrenheit. As the mass hurtled closer to our planet’s crust, the pressure of ever-denser air forced it to shear and fracture along its crystalline planes, causing a monumental aerial explosion that was heard by human observers on the ground. The shockwave reportedly knocked over forest workers as twisted shards of metal rained down among snowy pines. Sikhote-Alin meteorites fall into two categories: shrapnel fragments, which are melted, torn, and blasted, resembling the remnants of wartime bombs. Others are complete pieces, their surfaces rounded and sculpted by ablation into fantastical shapes, and covered or partially covered with scalloped indentations called regmaglypts or thumbprints. These sculpted pieces, known as individuals, present beautiful natural formations and comprise only about 20% of all recovered masses.

Sikhote-Alin Shrapnel

These resulting angular fragments starkly illuminate the catastrophic forces inflicted upon incoming meteorites: melted, torn, and blasted, they so resembled the remnants of wartime bombing that they were named shrapnel. Nearly all recovered Sikhote-Alin specimens were cleaned by the finders. Some were wire-brushed, others were tumbled. Unfortunately sometimes in the cleaning process finer surface details were lost forever. Pristine as-found examples, such as some of the ones listed here are extremely rare and much coveted by collectors. With a rich orange-ochre natural patina, these battered visitors from space are an eerie unaltered survivor from the greatest meteorite fall in recorded history.

Sikhote-Alin Oriented

Most incoming potential meteorites spin and tumble as they plummet through the atmosphere. Occasionally, one will maintain a fixed orientation towards the surface of our planet, causing the leading edge to ablate into a shield, nose cone, or bullet shape. When meteorites ablate, some of their mass is removed as a result of vaporization. Meteorites which display such features are quite rare, highly collectible, and are described as oriented. Oriented meteorites were studied by early NASA spacecraft designers and the leading edges of such meteorites are reminiscent of the heat shields on Mercury, Gemini, and Apollo space capsules.

Soledade

The Soledade iron meteorite was found near the city of Soledade in Brazil in 1986, where reports are that it was “being heated with an acetylene torch and hammered.” Soledade displays a unique Widmanstätten pattern and is an octahedrite containing troilite, schreibersite, and kamacite. Octahedrites have a crystal structure that resembles an octahedron; when cut and polished, they display intersecting lines of lamellar kamacite.

Taza

Iron, Ungrouped Found in Northwest Africa, 2001 A colleague of ours in Europe calls this gorgeous meteorite “The Princess of the Irons” and the title is well deserved. Found near the Moroccan town of Taza in 2001, this rare desert iron is an ungrouped (UNGR) plessitic octahedrite and is also known as Northwest Africa 859. Taza irons display a lovely caramel colored patina; many specimens retain some original blue-grey fusion crust, and many also show features of orientation. Although similar in appearance to Sikhote-Alin individuals, the Taza shower was tiny in comparison, with a total known weight of approximately 100 kg. The majority of Taza irons are very small — less than 20 grams. The popularity of this iron has increased recently, significantly depleting our available inventory. We have a few 200 gram or less specimens available please email to inquire.

The Eidson Iron / Arispe (Nova 057)

Circa 1955, a woman out walking near her rural village in Sonora, Mexico (the find site for Arispe) noticed an unusual iron-like rock weighing nearly 61 pounds. She gave the rock to her grandson who eventually moved to San Antonio, Texas, keeping the rock with him as a curiosity. Many years later, the grandson’s friend, Tim Eidson, noticed the rock and purchased it from the grandson, thinking it might possibly be a meteorite. He was correct. As an exact find location had not been noted, the new iron was originally named Nova 057 and—after donating a small piece that Tim and his friend Pete Rios had removed—the specimen was initially and incorrectly classified as a common IIAB iron. Subsequently, the Eidson Iron was studied by three prominent meteorite academics, including the late Dr. John Wasson at UCLA, and was reclassified as an extremely rare IC iron. There are only eleven known IC irons in all of meteorite science. Arispe is one of those eleven and, after further work was carried out, a determination was made by meteoriticists the Eidson Iron is “indistinguishable from Arispe.” We have no reservation in offering these beautiful etched slices as Arispe. The extremely rare type, expert inspection of the meteorite, measurement of the bandwidth, plus the find site all point to these slices being newly-available examples of the extremely-difficult-to-acquire historic Arispe. We await an update to the Meteoritical Bulletin reflecting this new classification.

Toluca

Iron, IAB-sLL Found in Mexico, 1776 First discovered in 1776 in Mexico, Toluca, as known as Xiqipilco, is one of the oldest-known meteorites on Earth. Found in the hills west of Mexico City, there are numerous documented instances of Toluca being used in colonial times (and possibly earlier) as natural source material for making weapons and tools. The Toluca strewn field was also the site of meteorite pioneer H.H. Nininger’s first great expedition, making it an historic and collectible iron on two counts. 

Uruaçu

Iron, IAB-MG Found Goiás, Brazil in 1992 Uruaçu (pronounced “Oo – roo – ah – SUE”) is an interesting iron meteorite first found on a ranch in Brazil. It has a comparatively low total known weight, and a significant number of recovered specimens were very large. The entire strewnfield lies on private land and has been hunted exclusively by the owner and his agents over a period of many years. As a result, Uruaçu irons appear only occasionally on the market. It is a coarse octahedrite and when cut and etched it displays a highly attractive Widmanstätten pattern, somewhat similar to Sikhote-Alin.

Veevers

We don’t often see Veevers offered on the meteorite market. This IIAB iron fell in Australia and was found in 1984—the largest fragment found, to date, weighs only 36 grams. The meteorite left behind a crater, which is named after Australian geologist John Veevers; in this indirect way, the Veevers meteorite may be one of the few named after a person. The impact crater was discovered in 1975—the discovery of small, metallic meteorite fragments confirmed its origin.

Wabar

Iron, IIIAB Found in Saudi Arabia, 1863 As a rare sand impact, in a now inaccessible region of the Saudi Arabian desert, the Wabar crater field one of the most elusive and mysterious impact sites on Earth. This, the world’s only known sand craters of significant size, was formed by the impact of a IIIAB iron meteorite weighing many tons. It has a possible fall date of 1863, although some estimates put the age in the thousands of years. The heat and pressure generated by the event formed a diverse and remarkable collection of Wabar Impactites, including exquisite black glass spheres known as Wabar Pearls. Also found are the strange Wabar Oxidized Irons –a weathered iron meteorite fragment — and the Wabar Iron, in an unaltered state! The Wabar crater is one of about fifteen craters on Earth from which we have recovered meteorite fragments. An interesting anecdote was reported to our colleagues — some of the iron fragments from Wabar appear “popped,” this phenomena is thought to be caused by high temperatures and pressures at impact. This caused the iron to oxidize rapidly, giving the Wabar Oxidized Irons the classic “weathered” appearance — a feature which typically indicates they have been on Earth a substantial amount of time. This was first time we heard of this phenomena, and if you have further expertise please let us know. The question we ponder is — how is it we see well preserved irons and weathered irons, at the same impact site? Puzzling! The site has always been nearly inaccessible and has only been visited a few times in history. Average temperatures in summer can reach a blistering 140 degrees Fahrenheit. Shifting sands have slowly filled in the craters over time and they are, today, almost obliterated. First discovered in 1932, differing reports place the number of craters between three and five. Political events in the Middle East have made the area extremely dangerous and we have been advised by local experts that it is now impossible to reach. As such, we are extremely fortunate to be able to offer this rare and beautiful material. Please visit our Impactites page for available Wabar Impactite offerings, here: https://aerolite.org/shop/our-impactites/

Wolf Creek

Iron, IIIAB Found in Australia, 1947 Wolf Creek, located in the wilds of Western Australia, is one of only about 15 craters on Earth that have produced recoverable meteorites and is also one of the oldest, with recent studies estimating its age at 120,000 years. It was made famous by a horror film of the same name and is revered by Aborigines as a site of mythic importance. Meteorite hunting is no longer allowed at Wolf Creek, making these old-collection specimens a must for those who are intrigued by crater-forming irons.