Tinzenite

tinzenite

rhodochrosite

rhodonite

braunite

Images

Formula: Ca2Mn2+4Al4[B2Si8O30](OH)2
Sorosilicate (Si2O7 groups), borosilicate, axinite group, manganese-bearing mineral
Specific gravity: 3.355 to 3.433
Hardness: 6½ to 7
Colour: Lemon-yellow, orange, red
Common impurities: Ti,Mg,Ba,Na,K,H2O
Environments

Pegmatites
Metamorphic environments
Hydrothermal environments

Tinzenite occurs in pegmatites, quartz veins and metamorphosed manganese-bearing rocks (Dana, Mindat). Associated minerals include calcite, quartz, rhodochrosite, rhodonite and braunite (HOM, Mindat).

Localities

At Klučov, Třebíč District, Vysočina Region, Czech Republic, tinzenite has been found in an NYF granite pegmatite (Mindat).

At the Valgraveglia mine, Reppia, Ne, Genoa, Liguria, Italy, tinzenite occurs in metamorphosed manganese-bearing rocks (HOM).

At Akatore Creek, Clutha District, Otago Region, New Zealand, tinzenite occurs in quartz veins in chert of the greenschist facies (HOM).

The type locality is Parsettens Alp, Tinizong, Surses, Albula Region, Grisons, Switzerland.

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