Sieber Agate 8mm Round AA Grade - 15-16 Inch Shape_Keshi 000 years ago

000 years ago

The ribbed surface adds light-play and dimension

often dating back centuries or even millennia (from periods like the Gandhara civilization or earlier)

and is traceable to virtually all ancient civilizations

cobalt or nickel

Sieber Agate 8mm Round AA Grade - 15-16 Inch Shape_Keshi 000 years agoSieber 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