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Bright Red Pyroxmangite

The Mineral pyroxmangite

Pyroxmangite is a rare high-temperature polymorph of the mineral Rhodonite. Its appearance is almost identical to Rhodonite, and only complex scientific tests can distinguish the two minerals.
Chemical Formula MnSiO3
Composition Manganese silicate
Color Red, pink, yellow-brown, brown
Streak Colorless
Hardness 5.5 - 6
Crystal System Triclinic
Crystal Forms
and Aggregates
As grainy masses, in compact groupings, and massive. Single crystals are uncommon.
Transparency Translucent
Specific Gravity 3.8
Luster Vitreous
Cleavage 1,2
Fracture Hackly, uneven
Tenacity Brittle
In Group Silicates; Inosilicates
Striking Features Color and crystal habits
Environment Manganese-rich metamorphic environments.
Rock Type Metamorphic
Popularity (1-4) 4
Prevalence (1-3) 3
Demand (1-3) 3

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Worldwide localities include the Taguchi mine, Shidara, Japan; Broken Hill, New South Wales, Australia; the Morro da Mina in Conselheiro Lafaiete, Minas Gerais, Brazil; and Tunaberg, Nyköping, Sweden.

Localities in the U.S. are Silverton, San Juan Co., Colorado; and Franklin and Ogdensburg, Sussex Co., New Jersey. The type locality for Pyroxmangite is Iva, Anderson Co., South Carolina, but analysis has determined that specimens from this locality are actually a rare isomorphous mineral known as Pyroxoferrite.

Calcite, Tephroite, Rhodonite, Pyrolusite

Rhodonite - Indistinguishable without complex tests.
Bustamite - Lighter pink.
Pink Feldspars - Usually occurs in larger crystals.

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