Minerals identify

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Graftonite

Phosphate mineral

Graftonite is an iron phosphate mineral with the chemical formula (Fe2+,Mn,Ca) 3(PO 4) 2. It forms lamellar to granular translucent brown to red-brown to pink monoclinic prismatic crystals. It has a vitreous luster with a Mohs hardness of 3.67 to 3.7.

It was first described from its type locality of Melvin Mountain in the town of Grafton , in Grafton County, New Hampshire.

Identification

Crystal ( diaphaneity )

Monoclinic