Prehnite 6mm Double Heart Faceted A Grade - 15-16 Inch Black Eye Agate It's also known as Angelita

It's also known as Angelita and Angelite Quartz

This later combined with additional silica in the groundwater as well as the minerals that give Mookaite its distinctive colors

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The cleaner facet from this cutting process results in significantly more sparkle than seen in stone cut by other methods

black or brown veins running through it in web-like patterns

Prehnite 6mm Double Heart Faceted A Grade - 15-16 Inch Black Eye Agate It's also known as AngelitaPrehnite 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.