Whitlockite
Whitlockite is named after Herbert Percy Whitlock, Curator of minerals, American Museum of Natural History, New York, USA.
Whitlockite forms transparent to translucent colourless, white, gray, yellowish or pinkish rhombohedral or tabular crystals with vitreous to resinous lustre.
Whitlockite forms transparent to translucent colourless, white, gray, yellowish or pinkish rhombohedral or tabular crystals with vitreous to resinous lustre.
| General Information | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chemical Formula |
| |||||||||||||||||||||
| Physical Properties of Whitlockite | ||||||||||||||||||||||
| Mohs Hardness | 5, Handbook of mineralogy (2001) | |||||||||||||||||||||
| Specific Gravity | 3.12, Handbook of mineralogy (2001) | |||||||||||||||||||||
| Fracture | Uneven,Sub-Conchoidal, Handbook of mineralogy (2001) | |||||||||||||||||||||
| Optical Properties of Whitlockite | ||||||||||||||||||||||
| Optical Character | Uniaxial/-, Handbook of mineralogy (2001) | |||||||||||||||||||||
| Colour | ||||||||||||||||||||||
| Colour (General) | Colorless, white, gray, yellowish; colorless in transmitted light., Handbook of mineralogy (2001) | |||||||||||||||||||||
| Transparency | Transparent,Translucent, Handbook of mineralogy (2001) | |||||||||||||||||||||
| Lustre | Vitreous,Resinous, Handbook of mineralogy (2001) Subresinous | |||||||||||||||||||||
| Crystallography of Whitlockite | ||||||||||||||||||||||
| Crystal System | Hexagonal, Handbook of mineralogy (2001) | |||||||||||||||||||||
| Habit | Typically as rhombohedral crystals, rarely flat tabular, several other smaller forms, to 2 cm. May form cave pearls; as anhedral grains and microcrystalline crusts., Handbook of mineralogy (2001) | |||||||||||||||||||||
| Geological Environment | ||||||||||||||||||||||
| Where found: | An uncommon secondary mineral in complex zoned granite pegmatites; in phosphate rock deposits; may be formed in caves from leached guano; in chondrite meteorites., Handbook of mineralogy (2001) | |||||||||||||||||||||
| Further Information | ||||||||||||||||||||||
| Mineral information: | Whitlockite information at mindat.org | |||||||||||||||||||||
| Significant Gem Localities | ||||||||||||||||||||||
| ||||||||||||||||||||||