Obsidian and Black Quartz wall hanging decoration

Obsidian is an igneous rock occurring as a natural glass formed by the rapid cooling of viscous lava from volcanoes. It is extremely rich in silica, is low in water, and has a chemical composition similar to rhyolite.

Quartz is a chemical compound consisting of one part silicon and two parts oxygen. It is the most abundant mineral found on the Earth's surface, and its unique properties make it one of the most useful natural substances.