Prehnite 6mm Round AAA Grade - 15-16 Inch Tucson Online Week 1 In rare and highly sought

In rare and highly sought after specimens

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Whether you're drawn to it's beauty or you are a collector of cool rocks

Boulder Opal is believed to help with spiritual development

Prehnite 6mm Round AAA Grade - 15-16 Inch Tucson Online Week 1 In rare and highly soughtPrehnite 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.