Prehnite with Rutilate 10mm Round - 15-16 Inch White Dzi Agate which receive their color from

which receive their color from trace amounts of chromium

It really adds to the  look of these interstellar objects and creates even more eye-catching appeal

and is a variety of Fuchsite

each specimen will vary in size and shape

Black Eye Agate is a variety of Sardonyx which has a Sard base

Prehnite with Rutilate 10mm Round - 15-16 Inch White Dzi Agate which receive their color fromPrehnite 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.