This is a stunning thumbnail sized specimen of Quartz and Hydroxylherderite

Shape: Hexagon Cut

9 gram Libyan Desert Glass from Kuffra

It most commonly is found as small white "cotton ball" formations within basalt geodes

The term impactite encompasses shock-metamorphosed target rocks

Kofelsite Impact Myth | Grey Melt Rock | 16.51 grams | Köfels Structure | Austria | SO24 Hidalgoite This is a stunning thumbnailThis is a 16. 51 gram Grey Melt Rock from the Kfels Structure, Austria. It measures 43x27x13 mm. The specific origin of kofelsite rocks is uncertain & debated. The rocks are found in a landslide deposit in western Austria. Researchers have suggested that the landslide was impact triggered. The kofelsite samples in the landslide deposit thus may be impactites (fused rocks from the heat of impact). Some workers have suggested that the rocks are