Obsidian - 100 pounds* Selenite such as copper

such as copper

Clarity: Fluorite crystals can range from transparent to translucent

It can vary depending on the direction of the cleavage

5 pounds of shipping space*

Clarity: It often appears opaque or translucent with a milky appearance

Obsidian - 100 pounds* Selenite such as copperNatural Obsidian from Mexico 100 pounds* Mostly large pieces *Requires 150lbs of shipping space Obsidian is a naturally occurring volcanic glass that typically forms when lava cools rapidly without sufficient time for crystal growth. Color: Obsidian comes in various colors, including black, brown, gray, and green. The most common is black obsidian, which is often referred to simply as "obsidian." Hardness: Obsidian has a hardness of approximately 5 to