Sieber Agate 8mm Round AA Grade - 15-16 Inch 6mm Matte They are rough specimens but

They are rough specimens but polished on one side to show off all it's amazing colors

it is made up of volcanic glass

many people believe that diamonds are formed from coal

and other colorful materials

but Sonoran Mountain is unique because it is often found in clay deposits as nuggets

Sieber Agate 8mm Round AA Grade - 15-16 Inch 6mm Matte They are rough specimens butSieber agate is not a true agate but rather a glassy, dark blue grey or green copper slag that formed during ancient copper smelting in Germany, specifically from the Siebertal area. This historical "ancient slag" has a naturally swirling, intricate appearance resembling agate due to silica and mineral inclusions from the smelting process. It is a rare and collectible material known for its lapidary qualities, similar to obsidian, and is sometimes