Question

The texture of obsidian is best described as glassy.Why does obsidian contain few or no mineral grains? by the way I put it under physics because that's what it's labeled as on my side.

Answer 1

hi, so the material that would normally form mineral crystals does not have time to form a crystalline structure because of very rapid cooling after volcanically erupting into the air or onto the surface. Obsidian is a volcanic glass.