Kostovite
| Kostovite | |
|---|---|
Exhibition of Kostovite in the National Natural History Museum, Sofia, Bulgaria | |
| General | |
| Category | Telluride mineral |
| Formula | AuCuTe4 |
| IMA symbol | Ktv |
| Strunz classification | 2.EA.15 (10 ed) 2/D.16-10 (8 ed) |
| Dana classification | 02.12.13.4 |
| Crystal system | Orthorhombic |
| Crystal class | Pyramidal (mm2) H-M Symbol: (mm2) |
| Space group | Pma2 |
| Identification | |
| Color | Grayish white |
| Twinning | Fine lamellar |
| Cleavage | Distinct/good |
| Tenacity | Brittle |
| Mohs scale hardness | 2 – 2.5 |
| Luster | Metallic |
| Diaphaneity | Opaque |
| Specific gravity | 7.94 |
| Optical properties | Anisotropic |
| Pleochroism | Visible |
| References | |
Kostovite (IMA symbol: Ktv) is a rare orthorhombic-pyramidal gray white telluride mineral containing copper and gold with chemical formula AuCuTe4.