Hureaulite
Hureaulite is named after its discovery locality, at the Huréaux quarry, St-Sylvestre, 21 km north of Limoges, Haute-Vienne, France.
Hureaulite forms transparent to translucent light rose to pink to rose-violet, orange or yellowish brown long to short prismatic elongated crystals with vitreous to greasy lustre.
Hureaulite gems are usually translucent and moderately included. Therefore faceted stones are very rare. Hureaulite can be used as ornamental material.
Hureaulite forms transparent to translucent light rose to pink to rose-violet, orange or yellowish brown long to short prismatic elongated crystals with vitreous to greasy lustre.
Hureaulite gems are usually translucent and moderately included. Therefore faceted stones are very rare. Hureaulite can be used as ornamental material.
| General Information | ||||||||||||||||||||||||||
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| Chemical Formula |
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| Physical Properties of Hureaulite | ||||||||||||||||||||||||||
| Mohs Hardness | 3.5, Gems, Sixth Edition (2006) | |||||||||||||||||||||||||
| Specific Gravity | 3.19, Gems, Sixth Edition (2006) | |||||||||||||||||||||||||
| Optical Properties of Hureaulite | ||||||||||||||||||||||||||
| Refractive Index | 1.647 to 1.667, Gems, Sixth Edition (2006) RI for the alpha, beta and gamma rays is 1.647–1.654, 1.654–1.662 and 1.660–1.667 | |||||||||||||||||||||||||
| Optical Character | Biaxial/-, Handbook of mineralogy (2001) | |||||||||||||||||||||||||
| Birefringence | 0.012, Gems, Sixth Edition (2006) | |||||||||||||||||||||||||
| Pleochroism | Colorless - yellow to pale rose - reddish yellow to reddish brown., Handbook of mineralogy (2001) | |||||||||||||||||||||||||
| Dispersion | Very strong, crossed., Handbook of mineralogy (2001) | |||||||||||||||||||||||||
| Colour | ||||||||||||||||||||||||||
| Colour (General) | Light rose to pink to rose-violet, orange or yellowish brown, Gems, Sixth Edition (2006) | |||||||||||||||||||||||||
| Transparency | Transparent,Translucent, Gems, Sixth Edition (2006) | |||||||||||||||||||||||||
| Lustre | Greasy, Gems, Sixth Edition (2006) More from other references | |||||||||||||||||||||||||
| Crystallography of Hureaulite | ||||||||||||||||||||||||||
| Crystal System | Monoclinic, Gems, Sixth Edition (2006) | |||||||||||||||||||||||||
| Habit | Long to short prismatic elongated crystals, Gems, Sixth Edition (2006) | |||||||||||||||||||||||||
| Geological Environment | ||||||||||||||||||||||||||
| Where found: | Occurs as a late-stage secondary mineral formed by the alteration of primary phosphates in complex granite pegmatites, Gems, Sixth Edition (2006) | |||||||||||||||||||||||||
| Further Information | ||||||||||||||||||||||||||
| Mineral information: | Hureaulite information at mindat.org | |||||||||||||||||||||||||
| Significant Gem Localities | ||||||||||||||||||||||||||
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