Triplite is a rare phosphate mineral with formula: (Mn, Fe)2PO4(F, OH).

It occurs in phosphate-rich granitic pegmatites typically as irregular brown opaque masses.

[3] In color and appearance, it is very similar to rhodocrosite, another manganese bearing mineral.

It has been found in the United States in California, Nevada, Arizona, Colorado, South Dakota, Virginia, Connecticut, and Maine.

Other occurrences include the Shigar Valley, Pakistan; China; Bavaria, Germany; Kimito, Finland and Karibib, Namibia.