Schorlomite

minerals

leucite

brookite

nepheline

Images
Formula: Ca3Ti2(SiFe3+2)O12
Nesosilicate (insular SiO4 groups), garnet group, forms a series with andradite
Specific gravity: 3.81 to 3.88
Hardness: 7 to 7½
Streak: Dark brown
Colour: Pitch black, brownish black
Environments

Plutonic igneous environments
Carbonatites
Metamorphic environments

Schorlomite occurs principally in alkaline igneous rocks, such as syenite and fenite (Dana), also in carbonatites, phonolite and skarn (HOM).

Localities

At the type Locality, Magnet Cove, Hot Spring Co., Arkansas, USA, schorlomite is associated with leucite, brookite, nepheline and K-feldspar (HOM).

Common impurities: Na,Al,Mn,Mg,Na,K,H20,P,Zr,V

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