| Bobdownsite | |
|---|---|
| General | |
| Category | phosphate |
| Formula (repeating unit) | Ca9Mg(PO4)6(PO3F) |
| Crystal system | trigonal |
| Identification | |
| Color | Pale/ Colorless, Transparent |
| Crystal habit | brittle |
| Twinning | none |
| Cleavage | none |
| Fracture | uneven and subconchoidal |
| Mohs scale hardness | 5 |
| Streak | White |
| Density | 3.14 g/cm^3 |