Prehnite 8x10-9x13mm Side Drilled Pebble - 15-16 Inch hps_08142025 which tends to be a

which tends to be a strong blue color

Sonoran Gold Turquoise is prized for its vibrant green and blue hues

Weight: grams: 60-90 grams

Black Oxide

It often features a mix of vibrant blue and green hues

Prehnite 8x10-9x13mm Side Drilled Pebble - 15-16 Inch hps_08142025 which tends to be aPrehnite 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.