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Single Black Schorlomite Crystal

The Mineral schorlomite




Schorlomite is sometimes regarded as a titanium-rich variety of Andradite, but it is recognized by the IMA as a distinct mineral species. Schorlomite is a rare member of the Garnet group, and some specimens labeled as Schorlomite are really just the Melanite form of Andradite. Schorlomite is named for its resemblance to the black Tourmaline mineral Schorl.
Chemical Formula Ca3(Fe3+,Ti)2(Si,Ti)3O12
Composition Calcium iron titanium silicate
Color Dark brownish-black to black
Streak Colorless
Hardness 7 - 7.5
Crystal System Isometric
3D Crystal Atlas
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Crystal Forms
and Aggregates		 As small dodecahedral and trapezohedral crystals. Crystals are usually microcrystalline. Also grainy and massive.
Transparency Opaque
Specific Gravity 3.8 - 3.9
Luster Vitreous
Cleavage None
Fracture Conchoidal to uneven
Tenacity Brittle
In Group Silicates; Nesosilicates; Garnet Group
Striking Features Color, crystals, and environment
Environment In alkaline-rich igneous environments.
Rock Type Igneous
Popularity (1-4) 4
Prevalence (1-3) 3
Demand (1-3) 3


Schorlomite AUCTIONS
OTHER NAMES
Ferrotitanite




NOTEWORTHY LOCALITIES
Schorlomite is not a common mineral. Its type locality, which has produced good individual crystals, is Magnet Cove, Hot Spring Co., Arkansas. Other localities include Jabal Bou-Agrao, Khénifra Province, Morocco; Tanfit, Ouarzazate Province, Morocco; and Hillesheim, in the Eifel Mountains of Germany.

COMMON MINERAL ASSOCIATIONS
Calcite, Magnetite, Orthoclase, Nepheline, Apatite



schorlomite PHOTOS
 
ADDITIONAL RESOURCES
 
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