O is for Obsidian rock

3D ModelNoAI

Size: 8 x 7 x 3.5 cm

Type: Igneous rock (volcanic glass)

Description: Obsidian is a naturally occurring volcanic glass that is formed by the rapid cooling of lava without crystallization. Its chemical composition is similar to that of granite and rhyolite, with a high silica content (around 70%) and a range of other minerals such as feldspar, mica, and iron oxide.

Texturally, obsidian is typically dark and shiny, with a smooth, glassy texture that is formed by the rapid cooling of lava. Obsidian lacks any crystal structure and can be fractured with sharp edges, which made it an ideal material for tool-making and weapons in ancient times.

Website: http://geology.uaic.ro/muzee/mineralogie/

Concept & 3D-modelling by Andrei Ionut APOPEI