Meteorites & Tektites


Are you fascinated by Impactites, Meteorites, Tektites or even Volcanic Bombs as we are, then this may just be the page for you! To introduce myself, I am John Iwaszko and have been interested in rocks, crystals, gemstones, particularly meteorites and Tektites since the early 1980's. I found my first Australite, on my very first tektite search in the mid 80's, when I was still a teenager- trust me it must have been beginners luck but felt like a spiritual experience that endeared me to these special rocks forever after.

Today, I mainly fossik with a partner and on occasions teams or other family members, where we research localities and fully document prospecting finds with great scientific analysis and curiosity all in an effort to add to the wealth of knowledge for future generations, that will be published as soon as we are no longer physically able to search the harsh areas we do.
Is the curious looking rock you found a meteorite, tektite or other?
We might be able to identify its probability from a photo you can send, free of any obligation. If it looks promising to us, no guarantee, you can then send it to us for closer examination and for a small fee of $25.00 we can then confirm a simple answer. You would be obligated to pay for delivery to us and back to yourself. We strongly suggest a registered post.
For a fee of $70.00, we can also offer a fully documented report of what your rock actually is and if a meteorite where it most likely came from.
We can perform chemical analysis, density, magnetic induction, petrographic analysis, microscopic, open window, spectrophotometer, specific gravity, streak, and visual tests.
Our business is in Sunbury, Victoria, Australia, samples sent for testing don't need to be large, a quarter-sized fragment is all that is needed. But please ensure that the sample is actually representative of the rock and reveals the interior composition (e.g. Do not send a rusty old flake that's fallen off the outside). Testing may take a few days to months depending upon the backlog of the facility and the type of tests performed, we can confirm the approximate date via e-mail. If we are in doubt or believe your sample is of exceptional worth we will send to an expert geologist colleague for a second opinion at no additional cost.
Who knows the rock you found may be worth a fortune as some meteorites and tektites are worth more than their weight in gold and can literally be priceless scientifically.

Some of our Best Tektite Finds:-

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I, John Iwaszko found the perfect Flanged Australite Button 4 September 2015, 1:55 PM, found with the "primary pitted rear surface" down, so the "rear surface", image, above, at far right is very well preserved, i.e., the opposite area exposed to the high pressure and the high-temperature frontal shock wave. Classification: Australite small round Indicator I, Perfect Flanged Button 24.3 x 10.4mm, 5.867g named “Thor”- No.48. 


Another perfect Flanged Australite Button found by myself, John Iwaszko on the 26-Oct-16 2016 4:13 PM, found with the "primary pitted rear surface" up, refer image, above far left and middle, so is more weathered than the "front surface" or the area exposed to the high pressure, high-temperature frontal shock wave. Classification: Australite small round Indicator I, Perfect Flanged Button 23.65 x 9.22 mm, 4.526g named “Aurora”-No.103.

Do you desire to own a unique piece of rock that came from the heavens? Have you dreamt of capturing a falling star or even a fiery rock that exploded from the bowls of the earth from a volcano unveiling the secrets of our planets build-up.
Well we can even sell a special rock to you, our specialty is tektites as well as meteorites that have been identified to have come from known planetary bodies such as Mercury ( still currently debated, most likely a piece during its early formation), the Moon, Mars, and many known asteroids, based on current availability and prior sales.
Identification of meteorites to its parent planetary body is based on direct comparison to pieces of planetary bodies spacecraft have already visited, namely the Moon, Mars, and some asteroids as well as spectrophotometric analysis from earth or space-bound telescopes that can match meteorite spectra here on earth.
This is where lighting, scientific and electronic test equipment and experience comes to good use and combines three of our scientific passions, astronomy, lighting science, and meteorites!
Planetary bodywall chart


Tektites (from Greek τηκτός tēktós, "molten") are gravel-sized bodies composed of black, green, brown, or gray natural glass formed from terrestrial debris ejected during meteorite impacts. The term was coined by Austrian geologist Franz Eduard Suess (1867–1941), son of Eduard Suess.[note 1][1] They generally range in size from millimeters to centimeters. Millimeter-scale tektites are known as microtektites.[2][3][4]

Tektites are characterized by:

  1. a fairly homogeneous composition
  2. an extremely low content of water and other volatiles
  3. an abundance of lechatelierite
  4. a general lack of microscopic crystals known as microlites and chemical relation to the local bedrock or local sediments
  5. their distribution within geographically extensive strewn fields


Although tektites are superficially similar to some terrestrial volcanic glasses (obsidians), they have unusual distinctive physical characteristics that distinguish them from such glasses. First, they are completely glassy and lack any microlites or phenocrysts, unlike terrestrial volcanic glasses. Second, although high in silica (>65 wt%), the bulk chemical and isotopic composition of tektites is closer to those of shales and similar sedimentary rocks and quite different from the bulk chemical and isotopic composition of terrestrial volcanic glasses. Third, tektites contain virtually no water (<0.02 wt%), unlike terrestrial volcanic glasses. Fourth, the flow-banding within tektites often contains particles and bands of lechatelierite, which are not found in terrestrial volcanic glasses. Finally, a few tektites contain partly melted inclusions of shocked and unshocked mineral grains, i.e. quartzapatite, and zircon, as well as coesite.[2][3][4]

The difference in water content can be used to distinguish tektites from terrestrial volcanic glasses. When heated to their melting point, terrestrial volcanic glasses turn into a foamy glass because of their content of water and other volatiles. Unlike terrestrial volcanic glass, a tektite produces only a few bubbles at most when heated to its melting point, because of its much lower water and other volatiles content.[5]


On the basis of morphology and physical characteristics, tektites have traditionally been divided into four groups. Those found on land have traditionally been subdivided into three groups: (1) splash-form (normal) tektites, (2) aerodynamically shaped tektites and (3) Muong Nong-type (layered) tektites. Splash-form and aerodynamically shaped tektites are only differentiated on the basis of their appearance and some of their physical characteristics. Splash-form tektites are centimeter-sized tektites that are shaped like spheres, ellipsoids, teardrops, dumbbells, and other forms characteristic of isolated molten bodies. They are regarded as having formed from the solidification of rotating liquids, and not atmospheric ablation. Aerodynamically shaped tektites, which are mainly part of the Australasian strewn field, are splash-form tektites (buttons) which display a secondary ring or flange. The secondary ring or flange is argued as having been produced during the high-speed re-entry and ablation of a solidified splash-form tektite into the atmosphere. Muong Nong tektites are typically larger, greater than 10 cm in size and 24 kg in weight, irregular, and layered tektites. They have a chunky, blocky appearance, exhibit a layered structure with abundant vesicles, and contain mineral inclusions, such as zircon, baddeleyitechromiterutilecorundumcristobalite, and coesite.[2][3][4][5]

Microtektites, the fourth group of tektites, are less than 1 mm in size. They exhibit a variety of shapes ranging from spherical to dumbbell, disc, oval, and teardrop. Their colors range from colorless and transparent to yellowish and pale brown. They frequently contain bubbles and lechatelierite inclusions. Microtektites are typically found in deep-sea sediments that are of the same ages as those of the four known strewn fields.[3][4]Microtektites of the Australasian strewn field have also been found on land within Chinese loess deposits and in sediment-filled joints and decimeter-sized weathering pits developed within glacially eroded granite outcrops of the Victoria Land Transantarctic Mountains, Antarctica.[6][7]


Since 1963, the majority of known tektites have been known to occur only within four geographically extensive strewn fields: the Australasian, Central European, Ivory Coast, and North American.[8][9] As summarized by Koeberl,[10] the tektites within each strewn field are related to each other with respect to the criteria of petrological, physical, and chemical properties, as well as their age. In addition, three of the four strewnfields have been clearly linked with impact craters using those same criteria.[2][3][4] Recognized types of tektites, grouped according to their known strewn fields, their associated craters, and ages are:

Comparing the number of known impact craters versus the number of known strewn fields, Artemieva considered essential factors such as the crater must exceed a certain diameter to produce distal ejecta, and that the event must be relatively recent.[11] Limiting to diameters 10 km or more and younger than 50 Ma, the study yielded a list of 13 candidate craters, of which the youngest eight are given below,

Name Location Age
(million years)
Strewn field
? Indochina? 0.78 32-114?[12] Australasian strewn field
Zhamanshin Kazakhstan 0.9 ± 0.1 14 ?
Bosumtwi Ghana 1.07 10 Ivory Coast strewn field
Elgygytgyn Siberia 3.5 ± 0.5 18 ?
Karakul Tajikistan <5 52 ?
Karla Russia 5 ± 1 10 ?
Ries Germany 15.1 ± 0.1 24 Central European strewn field
Chesapeake Bay USA 35.5 ± 0.3 40 North American strewn field
Popigai Siberia 35.7 ± 0.2 100 ?

Preliminary papers in the late 1970s suggested either Zhamanshin[13] or Elgygytgyn[14] as the source of the Australasian strewnfield.

Povenmire and others have proposed the existence of an additional tektite strewn field, the Central American strewn field. Evidence for this reported tektite strewn field consists of tektites recovered from western Belize in the area of the villages of Bullet Tree Falls, Santa Familia, and Billy White. This area lies about 55 km east-southeast of Tikal, where 13 tektites, two of which were dated as being 820,000 years old, of unknown origin, were found. A limited amount of evidence is interpreted as indicating that the proposed Central American strewn field likely covers Belize, Honduras, Guatemala, Nicaragua, and possibly parts of southern Mexico. The hypothesized Pantasma Impact Crater in northern Nicaragua might be the source of these tektites.[15][16][17]


Australite Round Indicator type I & Flanged form complete Buttons with partial Flanges

No.33. f.20-03-2015, 19.45 x 10.06mm, 2.9g. "Tadpole". No.35. f.24-03-2015, 22.63 x 11.53mm,4.6g. “Vindication”. No.39. f.03-05-2015, 21.36 x 9.89mm, 3.9g. “Cliffhanger”. No.52. f.07-09 2015, 24.09 x 10.06mm, 4.8g. This one looks new, like it just landed yesterday, very well preserved, found buried in soft clay the glass is 'crystal clear', a deep black, no abrasions, apart from the broken flange which appears freshly broken, it has maintained its original fire polish.
No.44. f.09-08-2015, 13.62 x 6.09mm, 0.899g. “Skank”. No.82. f.11-06-2016, 20.0 x 10.57mm, 3.289g. No.59. f.08-09-2015,1.88 x 4.60mm, 0.746g. No.60. f.23-09-2015,14.5 x 8.0mm,1.5g. “Armadillo”.

Australite Round Indicator type I & Flanged form partial Buttons with partial Flanges

No.43. f.29-08-2015,20.2x6.2 x 10.7mm,1 .2g. "Why". No.64. f.24-09-2015, 25.8 x 13.1x8mm, 2.04g. No.79. f.27-05-2016, 9.5 x 14.6x7.3mm, 1.736g. No.87. f.02-09 2016, 8.3 x 9.4mm, 2.436g.

Australite Round Indicator type I & Flanged form partial Flanges

No.24. f.22-01-2015 by AW 1.2g. No.49. f.05-09-2015, 7.66 x 6.21 x 4.94mm, 0.379g. No.93. f.22-10-2016, 17.31 x 3.53mm, 0.501g. “Horseshoe luck”. No.72-78. f.15-01 2016-26-05-2016,75 is 17.9 x 3.2mm, 0.62g. No.73 - “Finger nail”.

Australite Round Indicator type I without Flange or slight partial Flanges as well as Lens form-discs

No.26. f.22-01-2015 by AW 0.35g. No.38. f.03-04-2015,13.77 x 6.52mm, 0.3g.““Hot cross button-smartie/salvation”. No.55. f.07-09-2015, 7.93 x 8.27mm, 2.397g. No.57-59. f.08-09 2015, all similar size,59 is 11.9 x 4.6mm, 0.75g.
No.84. f.31-08-2016, 13.4 x 7.6mm, 1.3 g. "U.F.O.". No.90. f.04-09-2016, 11.71 x 6.56mm, 1.1g. No.96. f.23-10-2016,14.4 x 9.4mm, 0.7g. No.101. f.25-10-2016,10.3 x 5.5mm, 0.481g.
No.107. f.29-04-2017,15.2 x 7.5mm,1.379g. “Bella”. No.115. f.06-05-2017,14.6 x 9.4mm,0.781g No.125. f.17-11-2017,19.7 x 10.9mm, 4.2g. “Clock”. No.127. f.03-11-2018, 20.6 x 12.9mm, 5.4g.

Australite Boats, ovals, bowls, dumbells, Indicator type I, Flanged form, partial Flanges or cores

No.10. f.20-09-2014, Broad oval Round Indicator 1, Flanged oval 17.93 x 13.89 x 7.93mm, 2.206g. “Shuttle”. No.21. f.29-11-2014, Narrow Oval Indicator 1, Flanged Boat, 19.83 x 10.61 x 6.11mm, 1.235g. “Victory”. No.23. f.19-01-2015, Australite Boat Core, 48.55 x 19.37 x 14.87mm,19g. “Big Boat JH Dream”. No.34. f.24-03 2015, asymmetrical dumbbell indicator I,20.35 x 17.81 x 8.89mm,3.9g. “Assurance”.
No.41. f.09-08-2015, asymmetrical dumbbell indicator I, Flanged, 21.06 x 13.26 x 8.52mm, 2.5g. “Thunderbird 2/ Mig 105”. No.42. f.09-08-2015, Boat bowl, Micro thin Flanged Boat, 17.73 x 8.4 x 2.69mm, 0.336g. “Persistence”. No.53. f.07-09-2015, asymmetrical dumbbell indicator I, Flanged, 12.94 x 5.45 x 1.69mm, 0.265g. No.67. f.31-10-2015, asymmetrical dumbbell Indicator 1, flanged band, no flange,35.49 x 10.99 x 8.36mm, 4.186g.

Australite Round Cores, type II

No.50. f.05-09-2015, small Indicator Type II core, 18.23 x 15.79mm, 6.881g. “Soyuz surprise”. No.91. f.04-09-2016, round small Indicator Type II core, 25.43 dia. x 20.66mm, 12.937g. “Cupcake”. No.108. f.29-04-2017, round small Indicator Type II core, Flat core 28.74 dia. x 19.30mm, 20.131g. "Toffee” This one also looks new like it just landed yesterday, well preserved buried in soft clay, the glass is a crystal clear, deep black, no abrasions, as it has maintained its original fire polish. No.111. f.02-05-2017, round conical small core, 16.01 dia. x 11.6mm, 3.175g. “Small cupcake”.
No.123. f.17-11-2017, round conical small core, 19.78.dia. x 19.12mm, 9.934g. No.119. f.13-07-2017, round small Indicator Type II core, 11.03 x 9.04mm, 1.251g. “Strawberry”. No.16. f.21-09-2014, round small core button 16.64 x 10.44mm, 2.756g. No.68. f.01-11-2015, round small core button, 16.40 x 11.43mm, 3.345g, "Apollo Capsule".


Hollow Australites

No.66. f.24-09-2015, narrow boat core wedged with a hollow cavity ring wave flow ridges, with round hollow cavity an internal bubble, pitted top and flanged band, only six hollow Australites are known previously 13.97 x 11.81 x 11.87mm, 1.549g.

Photoshop recreation from actual photos, (reflected and gaps filled in), of how Hollow tektite no.66 may have looked before it was fragmented, left - end view- showing the hollow and right - side elevation as a complete form.

No.74. f.20-01-2016, small round Indicator I. Dual hollowed out-double bubble top and bottom, broken Flanged Button 21.66 x 11.38 x 8.84mm, 1.804g.  “Macbeth-double bubble". Theoretical chain of events that created no.74 hollow tektite. A small bubble towards the ablation anterior end of flight, 1, is ablated and exposed the bubble, 2, further ablation caused trapped heat within the interior of the posterior end, 3,  a zone that is primarily pitted and exposed to minimum pressure and temperature begins to bubble, 4 and 5, the posterior surface from the inside until it may have burst whilst still in flight or broke when it fell. Images 4a, 5a, 6a, and 7a depict, ‘photoshopped’ images derived from actual photos, (reflected and gaps filled in), of how no.74 may have looked before it was fragmented. In particular, 4a is the anterior surface and 5a, 6a and 7a the posterior. The flange survived until it hit the earth’s surface as it is clearly chipped off and not ablated off. 7a depicts what this tektite may have looked like without the flange if it didn’t break, unfortunately, its final geometry made it very fragile.

No.80. f.29-05-2016, medium round hollow core form) Partial flanged hollow (plate) Fragment 38.66 x 20.44 x 13.56mm, 6.897g.

No.100. f.24-10-2016, Boat core with hollow. Hollowed out bubble bottom core, shaped boat based on the geometry and location of formed flange, very bad deterioration and pitting, 15.14 diameter x 10.63 x 8.32mm, 1.379g.

No.114. f.06-05-2017, round flanged form. Segmented Fragment of the main button, with the middle section that was possibly hollowed similar to no. 74, 15.19mm diameter x 7.77 mm, 0.805g.






My first Australite,  No. 1 (Australian tektite) find in 1984 when I was 16. CLASSIFICATION: Australite Boat/Broad Oval Lens/slight Dumbbell form.


Daughter two's first and second Darwin Glass, No's. 2 & 3, Impactite find 2013.


My Brother Adam's first Australite Tektite finds, No's 6 & 7 in 2013, No's-24, 26, 27 & 28 in 2015. 


Australite flanged button find in 2014- No.9., 20 September 2014 2:20 PM, CLASSIFICATION: Australite round small Indicator Type 1, Half flanged Button 22.33 x 11.54 x 12.14mm, 2.67g “Faith”.

jasmin2015-09-23 21.04.55

Daughter one, first Australite Find, 23 September 2015, Partial Flanged Fragment, No. 61, 7.27x 4.37mm, 0.328g.

planetary meteorites

We expertise in custom supplying Meteorites, Tektites, Impactites, Volcanic bombs, obsidian, fulgurites, testing kits etc to educational facilities.

You can freely download my Meteorite/Tektite Identification Tests, introducing a new simple Magnetic susceptibility test & ordinal magnetic scale. Linking electromagnetism with optics and gravity. Click Here

CALCULATING THE DENSITY, SPECIFIC GRAVITY TEST, MAGNETIC SUSCEPTIBILITY TEST & THE FLUX DENSITY OF MAGNETS- EXCEL SPREADSHEET, refer above PDF download for instructions. Click the link here. Copy of Magnetic Susceptibility 10-10-2017







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