Prehnite with Rutilate 6mm Round - 15-16 Inch 8X10mm black and red

black and red

but the difference in the pattern really stands out and shows it's individual beauty

reddish to browns

white and reddish brown in speckles

Prehnite with Rutilate 6mm Round - 15-16 Inch 8X10mm black and redPrehnite 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.