Obsidian is not technically a “gemstone” but instead a naturally occurring glass, but it is used for jewelry nonetheless–particularly apache tears and snowflake obsidian. Obsidian is found in many places in North America, Armenia, Italy, Mexico, Greece, and Scotland. Other impurities result in stones known as snowflake obsidian, golden obsidian, apache tears, and rainbow obsidian. Pure obsidian is dark, but impurities can result in dark green, brown, black, and gray coloring. It has been used experimentally in modern times by some surgeons because its cutting edge is many times sharper than surgical steel, and much smoother, creating a cleaner cut with less tissue damage, inflammation, and scarring. It breaks to form very sharp edges, and was therefore used since ancient times for arrowheads and other tools.īecause is has no crystal structure, obsidian blades can reach molecular thinness. Obsidian sits at a 5-5.5 on the Mohs scale of hardness.
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