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with additional major finds in 2008 and 2013
Each stone is unique in terms of its patterns
among other numerous names
Boulder Opal is believed to help with spiritual development
Sieber Agate 10mm Round AA Grade - 15-16 Inch Size_7-10mm with additional major finds inSieber 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
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