Obsidian, The Sparkling Birthstone for January 12th
Birthstone for January 12th: Obsidian Description of Obsidian Obsidian is a naturally occurring volcanic glass formed when lava cools rapidly, preventing the formation of crystals. Known for its deep black color, obsidian can also appear in shades of brown, green, or even rainbow hues, depending on the minerals present during its formation. Its smooth, glassy texture and sharp edges make it not only an intriguing mineral but also one historically valued for its cutting ability....