| Mineral class | Oxides : Hematite - Ilmenite - Magnetite group. |
| Chemical formula | MgTiO3 |
| Crystal system | Trigonal |
| Habitus | |
| Cleavage | Distinct on [1011], fracture conchoidal. |
| Hardness | 6 |
| Density | 4.05 |
| Color | Black, bluish black, brownish black to brownish red. |
| Streak | Purple brown. |
| Luster | Submetallic, translucent to opaque. |
| Description | A rare member of the ilmenite group of minerals. It forms a substitution series with ilmenite. |
| Occurance | Often found in kimberlites. |
| Associates | Ilmenite |
| Notes |
Type locality : Rakwana mine, Sabaragamuva, Sri Lanka. Discovered in 1892 by Dick. Named after Geikie, the director of the geological survey of Great Britain. |
| Localities | A rare mineral in Scandinavia. Sweden : No localities known. Norway : No localities known. Finland :
|
| To oxides index. |
Mineral group index. |
Main index. |
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