Obsidian is an igneous rock, essentially volcanic glass. It is formed during the outpouring of magma during the melting and solidification of quartz in the presence of water less than one percent. May contain volcanic ash, which makes obsidian black and reduces its transparency. Obsidian has been known since antiquity. And then, and now it is used in stone-cutting business. In processed form or in the form of chips, it can be confused with morion.
You can see obsidian stone for sale and buy it in the Minerals of Russia online store.
|Color||Deep black or blackish green|
|Mohs scale hardness||5–6|
|Specific gravity||c. 2.4|
|Other characteristics||Texture: Smooth|