Kirschsteinite

kirschsteinite

melilite

kalsilite

gotzenite

Images

Formula: CaFe2+(SiO4)
Nesosilicate (insular SiO4 groups), olivine group, forms a series with monticellite
Specific gravity: 3.434
Hardness: 5½
Streak: White
Colour: Greenish
Common impurities: Ti,Al,Mn,Mg,Na,K,P,H2O
Environments

Plutonic igneous environments
Metamorphic environments
Extraterrestrial environments

Kirschsteinite has been observed in calcareous skarn, peridotite, meteorites and lunar samples (Dana). Associated minerals include calcite, cuspidine, diopside, garnet, graphite, melilite, perovskite, titanium-rich augite, troilite and wollastonite (Mindat).

Localities

At the Nyiragongo Volcano, Nyiragongo Territory, North Kivu, DR Congo, kirschsteinite occurs with clinopyroxene, leucite, magnetite, melilite, nepheline and pyrrhotite (Dana).

At the type locality, Mount Shaheru, Nyiragongo Volcano, Nyiragongo Territory, North Kivu, DR Congo, kirschsteinite occurs in melilite-nephelinite lava associated with clinopyroxene, melilite, nepheline, kalsilite, götzenite, sodalite, combeite, magnetite, perovskite, apatite, brown hornblende and pale biotite (MM 31.698-699).

At the Tazheranskii Massif, Lake Baikal area, Irkutsk Oblast, Russia, kirschsteinite occurs in calcareous skarn, associated with titanium-rich augite, wollastonite, melilite, garnet, calcite, cuspidine, diopside, perovskite, troilite and graphite (HOM).

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