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5cm x 9cm x 3cm
piezoelectric and pyroelectric properties
"Faden quartz" is the anglicized version of the German "Fadenquarz"
This fossil is from the Eocene era at the Green River Formation in Wyoming
DARWIN GLASS IMPACTITE, Impact Melt, Australia YDG093 granite 5cm x 9cm x 3cmDarwin Glass Impactite Impact Melt Mt. Darwin Zeehan, Tasmania Australia Total weight: 4. 94 grams Approximate dimensions: 39mm x 17mm x 10mm Comes in a membrane display box. Comes with certificate of authenticity. As seen on Outback Crystal Hunters: Heart of (Darwin) Glass (Season 2, Episode 3), where Tom Kapitany and his crew led an expedition in Tasmania in search of impactites and tektites. Shipping Information Postage extra as per Australia Post.