Prehnite with Rutilate 10mm Round - 15-16 Inch rqtz-spe-str red and brown

red and brown

Aquamarine is a transparent to translucent stone ranging from cerulean blue to light blue in higher grades

Silica-rich waters create hardened deposits that preserve coral skeletons

yellow or gray and occasionally translucent milky white

Sweet and soft pink

Prehnite with Rutilate 10mm Round - 15-16 Inch rqtz-spe-str red and brownPrehnite 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.