often found in association with quartz

As the marcasite breaks down

It is metallic gray

Origin: Mined in Mount Mica Quarry

Approx Weight (per piece): 11

Prehnite and Graphite Cluster | Raw Prehnite | 4.5 grams | Tanzania Ametrine often found in association withPrehnite is a green to yellowish green colored mineral that belongs to the phyllosilicate family. It is composed of calcium, aluminum, and silicate, with traces of iron, magnesium, and other elements. Prehnite crystals have a unique pearly luster and can form in a variety of shapes, including tabular, prismatic, and stalactitic formations. Prehnite is believed to have a calming effect on the mind and emotions, promoting relaxation and inner peace. It