Black Obsidian is the result of molten lava rock cooling rapidly, becoming volcanic glass, and has been around ever since prehistoric times. Because of its ability to make strong sharp edges, it’s been used by Native Americans and Primitive people to make spear points, arrowheads, as well as some other cutting tools.
Chemical Formula: SiO2
Hardness: 5-5.5
***NOTE TO BUYER***
This is a "random selection" listing. You will NOT receive the exact item photographed in the listing, but one that is very similar. However, due to the unique nature of each mineral, the size, shape, and color may vary slightly.
Please reference secondary photos for examples of variations within the product. If you have certain specification requirements, please reach out via email.
