Weight:  276 Grams /   10 ounces

black Biotite crystal book from the Calcite Vein-Dikes of the Grenville Geological Province Ontario

A variety of labradorite showing strong labradorescence due to very fine exsolution of K-feldspar

Dimensions: 84x60x30 mm / 3

Impact Melt Glass | Flädle Glass | 39.8 Grams | Lake Mien Crater Impactite | Sweden Druzy Weight: 276 Grams / 10This is an outstanding specimen Impact Melt Glass, or "Fldle" glass, from the Lake Mien crater, 12 km (7. 5 mi) southwest of the town of Tingsryd, Sweden. It weighs 39. 8 grams and measures 54x49x20 mm. Although not a meteorite, impactites are directly linked to them and their impacts. Impactite is a slag like glassy object found on the surface of the earth, formed from rock melted by the impact of a meteorite. The term encompasses shock metamorphosed