Prehnite Natural 6X8 Pebble SD A Grade - 15-16 Inch hps_07272023 usually in white on hues

usually in white on hues of brown

famed mineralogist and jeweler George Frederick Kunz

Emerald and Heliodore -- and is often cut to highlight its chatoyant qualities

Labradorite is usually gray-green

Prehnite Natural 6X8 Pebble SD A Grade - 15-16 Inch hps_07272023 usually in white on huesPrehnite 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.