Like other igneous rocks, the glossy glass originates from molten rock that has been spewed out from the bowels of the Earth via volcanoes.. Before we get into the snowflakes, obsidian is formed ...

Obsidian is an example of an extrusive igneous rock. Obsidian has crystals which are so small that they are impossible to see without a microscope. Intrusive.

This molten earth origin is what classes rainbow obsidian as an igneous rock. Lava destined to become obsidian cools rapidly once on the surface and, thanks to its viscous nature, ...

Obsidian is a volcanic glass formed as an extrusive igneous rock (SiO 2 as main component ranging between 66% and 75%) that was used by Neolithic people (around 10000–3500 B.C.) as a raw ...

The Obsidian arrives as the second installment in the firm’s lineup of luxury, art-inspired audio products. Taking its name from the igneous rock that forms out of a volcano’s magma, ...