Obsidian is a volcanic glass whose formation is linked to the rapid cooling of magmas. The rapid cooling does not allow the crystals to arrange themselves according to ordered crystal lattices and causes them to arrange in a chaotic way. In ancient times, obsidian was very precious as it was used for the production of hunting tools and weapons.
Dimensions
Height (cm):
Depth (cm):
Width (cm): 3-5
Weight (g): 20
Property
Chemical Formula: Silicatic
Mohs scale: 6-7
Relative Density: 2-3
Crystalline System: Amorphous