Sieber Agate 10mm Round AA Grade - 15-16 Inch Stone Type_Green Lodalite Quartz A particularly soft stone

A particularly soft stone

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Shattuckite is a rare copper silicate hydroxide mineral

Hackmanite is very reactive under UV light

Labradorite is remarkable for the way its aggregate layers refract light

Sieber Agate 10mm Round AA Grade - 15-16 Inch Stone Type_Green Lodalite Quartz A particularly soft stoneSieber 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