Black Obsidian Freeform Standing Boulder LastChance leading to distinctive white banding

leading to distinctive white banding and exposed crystal druzy

Serpentine

#3   1-kilo average count: (  11-12   )

Honey calcite derives its color from iron ions caught in the crystal lattice while it forms

Black Obsidian Freeform Standing Boulder LastChance leading to distinctive white bandingBlack Obsidian Freeform Standing Boulder 1 Piece Uniqueness Guaranteed: Every item is one of a kind, making them ideal for all projects or designs. Avg Size Range: (3 to 5 Inches Long) Sizes Vary Obsidian is a kind of glass that forms when volcanic lava rapidly cools in the open air without forming any specific crystalline structures. When polished, obsidian can occasionally exhibit a gold, silver, or rainbow sheen depending on any included minerals.