| Mineral | Nepheline |
|---|---|
| Formula | (Na,K)AlSiO4 |
| Crystal Form | Trigonal/Pyramidal [3] |
| Cleavage | Poor on {1010}, {0001} |
| Color | White, grey, yellowish |
| Density | 2.5 – 2.7 g/cm3 |
| Diaphaneity | Transparent, Opaque |
| Fracture | Sub-conchoidal |
| Hardness | 5.5 - 6.0 |
| Lustre | Vitreous, Greasy |
| Dana 8 Class | 76.2.1.2 |
| Strunz Class | 8/J.02-10 |
| Mindat | mindat.org |
| WebMineral | WebMineral |
| ID | 220 |