Schorlomite
Mineral Ca3Ti2(SiFe2)O12
About it
Black titanium garnet with a glossy, shell-like break, found in alkaline igneous rocks; Magnet Cove, Arkansas, is the classic locality.
- Type
- Mineral
- Group
- Silicate (nesosilicate), garnet group
- Formula
- Ca3Ti2(SiFe2)O12
- Hardness (Mohs)
- 7–7.5
- Specific gravity
- 3.69–3.88
- Streak
- grey-black to brown
- Lustre
- vitreous (glassy)
- Crystal system
- Isometric (cubic)
- Colours
- black, deep red-brown
- Transparency
- opaque
- Cleavage and fracture
- none; conchoidal fracture
Typical values: real specimens vary. For more, see mindat.org.