Prehnite 7x10mm Faceted Tube - 15-16 Inch Ancient Cellar Agate Similar to Tiger's Eye

Similar to Tiger's Eye

This makes sapphires very durable and scratch-resistant

Amazonite is named for the Amazon River in Brazil

Shattuckite is a pseudomorph

but it can still be damaged by abrasion or compromised by exposure to moisture and chemicals

Prehnite 7x10mm Faceted Tube - 15-16 Inch Ancient Cellar Agate Similar to Tiger's EyePrehnite 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.