Sieber Agate 10mm Round AA Grade - 15-16 Inch 48hr_01202026 A cryptocrystalline Chalcedony

A cryptocrystalline Chalcedony

The blue colors are photosensitive and may fade when exposed to excessive light or heat

It is a white granite with dark gray mottling that also exhibits blue or green spots

Ethiopian Opal typically occurs in brown

It has tremendous healing powers and is said to help energize the inner body

Sieber Agate 10mm Round AA Grade - 15-16 Inch 48hr_01202026 A cryptocrystalline ChalcedonySieber 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