Black Obsidian Octagon Coasters (2 Pieces) (3-5 inches) Menu Sphere Holder Average size range: 350 to

Average size range: 350 to 750 grams

5 to 6 inches)

Rhodochrosite is actually closely related to manganoan calcite

similar to the igneous mineral microcline

picasso jasper is not actually a jasper

Black Obsidian Octagon Coasters (2 Pieces) (3-5 inches) Menu Sphere Holder Average size range: 350 toBlack Obsidian Octagon Coasters Uniqueness Guaranteed: Every item is one of a kind, making them ideal for all projects or designs. Origin: India Quantity: set of 2 Size: 3" 5" Obsidian is not a gemstone but a kind of glass that forms when volcanic lava rapidly cools in the open air without forming any specific crystalline structures. Depending on the included minerals, obsidian can occasionally exhibit a gold, silver, or rainbow sheen when polished.