Prehnite with Rutilate 8mm Round - 15-16 Inch Size_4x4-8mm Rainbow Obsidian earned its name

Rainbow Obsidian earned its name from the chatoyant

This effect is known as “labradorescence

Garnet was used as far back as the Bronze Age

neither a crystal nor a mineral

Prehnite with Rutilate 8mm Round - 15-16 Inch Size_4x4-8mm Rainbow Obsidian earned its namePrehnite was the first mineral to be named after a person: its discoverer, Dutch Colonel Hendrik Von Prehn. Von Prehn discovered the stone in South Africa in 1774. Prehnite is translucent to transparent, in colors from light green to yellow green to olive, with occasional inclusions of Black Tourmaline that crisscross the stone in fibrous patterns. It is a phyllosilicate composed of silicon, calcium and aluminum with trace amounts of iron.