Sieber Agate 10mm Round AA Grade - 15-16 Inch 48hr_01202026 bright red

bright red

Ethiopian Opal typically occurs in brown

By soaking the stone in a non-toxic chemical solution

A cryptocrystalline Chalcedony

Many stones in the Russian crown jewels from the 17th century which were thought to be rubies are actually red Tourmaline

Sieber Agate 10mm Round AA Grade - 15-16 Inch 48hr_01202026 bright redSieber 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