Prehnite 10mm Round AAA Grade - 15-16 Inch Square Donut Jasper is an opaque

Jasper is an opaque

and bold black spiderweb matrix—creating highly distinctive

It is mined in Peru

Ancient Cellar Red Agate is a natural agate that is dyed and heated to give it the unique color and pattern we call Ancient Cellar

Naturally occurring in hues of blue to green to green with spots and streaks of red

Prehnite 10mm Round AAA Grade - 15-16 Inch Square Donut Jasper is an opaquePrehnite 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.