Rough Obsidian / 1.5-2.5" AVG - 1 KILO LOT Menu Mushrooms it is sometimes called carnelian

it is sometimes called carnelian onyx

a volcanic rock that contains larger inclusions in a fine-grained stone

Listing is for (1 kilogram) (individual pieces weigh 250 to 500 grams)

holds about 12 ounces)

Each geode pair measures approximately 2

Rough Obsidian / 1.5-2.5" AVG - 1 KILO LOT Menu Mushrooms it is sometimes called carnelianQuantity: 1 kilogram Average size range: 1. 5 to 2. 5 inches Obsidian is not a gemstone, but instead 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.