graftonite

{{Distinguish|Gratonite}}

{{Infobox mineral

| name = Graftonite

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| image = Graftonite with Triphylite Iron manganese calcium phosphate Palermo Mine, North Groton, New Hampshire 2863.jpg

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| caption = Graftonite with Triphylite Iron manganese calcium phosphate Palermo Mine, North Groton, New Hampshire

| category = Phosphate minerals

| formula = {{chem2|(Fe^{2+},Mn,Ca)3(PO4)2}}

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| strunz = 8.AB.20

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| system = Monoclinic

| class = Prismatic (2/m)
(same H-M symbol)

| symmetry = P2₁/c

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Graftonite is an iron(II), manganese, calcium phosphate mineral with the chemical formula {{chem2|(Fe^{2+},Mn,Ca)3(PO4)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 5 and a specific gravity 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.