AI Appraisal Estimate

This item is a small, irregular fragment of tektite, specifically consistent with an Indochinite from the Australasian strewn field. The specimen measures approximately 15-20mm in length and exhibits a deep, sub-metallic black color with a dull to semi-glossy luster. Its physical construction is characterized by a glassy, amorphous structure typical of terrestrial impact glass formed from melted crustal rock. The surface shows notable 'pitting' and 'sculpting,' which are aerodynamic features or chemical etchings caused by its high-velocity atmospheric flight or subsequent burial over geologic time. The fragment has an irregular, somewhat kidney-like shape with rounded edges, suggesting it may be a broken piece of a larger 'splash' form. There are no visible maker's marks, as this is a natural occurrence, though it appears to be presented on protective foam packaging adjacent to a certificate of authenticity (COA), which commonly dates such finds to approximately 780,000 years ago. The condition appears stable with consistent patina and no fresh fractures, indicating a well-preserved surface. The lack of bubbles or large crystalline inclusions indicates high-quality silica melt during formation.

I have examined the digital images of this Indochinite tektite fragment, measuring approximately 15-20mm. The specimen displays the characteristic 'pockmarked' or 'pitted' surface texture and amorphous, vitreous structure consistent with members of the Australasian strewn field, dated roughly 780,000 years ago. The jet-black color and dull luster are typical of Indochinites. The condition is stable, with no significant modern chipping or 'flea bites' that would detract from its modest value. Indochinites are among the most common tektites found globally. While specimens with specific aerodynamic shapes (like 'dumbbells' or 'buttons') command higher premiums, small irregular fragments like this one are highly abundant and readily available on the collector market. Comparable sales for specimens of this size (under 10 grams) consistently fall in the $5.00 to $25.00 range depending on the retailer. The presence of a Certificate of Authenticity (COA) adds minor marketability for novice collectors but does not significantly increase the financial value due to the specimen's commonality. Final authentication via digital imagery is limited. While the surface features align with genuine splash-form tektites, a definitive assessment would require in-person verification of specific gravity and light transmission (which should show a translucent olive-brown hue at thin edges). For commercial purposes, the provenance provided by the COA is standard, but the item's low market value generally precludes the need for advanced laboratory testing such as mass spectrometry.