Prehnite with Rutilate 10mm Round - 15-16 Inch rqtz-spe-str This makes sapphires very durable

This makes sapphires very durable and scratch-resistant

red and brown

It is opaque and occurs in a wide variety of colors

decision making and creative thinking

Silica-rich waters create hardened deposits that preserve coral skeletons

Prehnite with Rutilate 10mm Round - 15-16 Inch rqtz-spe-str This makes sapphires very durablePrehnite 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.