| General Information |
|---|
| Chemical Formula | Anthony et al, Handbook of mineralogy (2001) |
|---|
| Physical Properties of Londonite |
|---|
| Mohs Hardness | 8Anthony et al, Handbook of mineralogy (2001) |
|---|
| Specific Gravity | 3.34Anthony et al, Handbook of mineralogy (2001) |
|---|
| Tenacity | BrittleAnthony et al, Handbook of mineralogy (2001) |
|---|
| Fracture | ConchoidalAnthony et al, Handbook of mineralogy (2001) |
|---|
| Optical Properties of Londonite |
|---|
| Optical Character | IsotropicAnthony et al, Handbook of mineralogy (2001) |
|---|
| Colour |
|---|
| Colour (General) | Colorless, white, sulfur-yellow, pale yellow, pale yellow-green.Anthony et al, Handbook of mineralogy (2001) |
|---|
| Transparency | Transparent,TranslucentAnthony et al, Handbook of mineralogy (2001) |
|---|
| Lustre | VitreousAnthony et al, Handbook of mineralogy (2001) |
|---|
| Crystallography of Londonite |
|---|
| Crystal System | IsometricAnthony et al, Handbook of mineralogy (2001) |
|---|
| Habit | As portions of Cs-rich material heterogenously distributed throughout crystals, patchy, exsolutionlike, and in veinlets; to 7 cmAnthony et al, Handbook of mineralogy (2001) |
|---|
| Geological Environment |
|---|
| Where found: | An uncommon component of granite pegmatites, in the central zones and in miarolitic cavities.Anthony et al, Handbook of mineralogy (2001) |
|---|
| Further Information |
|---|
| Mineral information: | Londonite information at mindat.org |
|---|
| Significant Gem Localities |
|---|
| Madagascar | | |
| Rhodizite-Londonite series |
|
|
