Boleite
Boleo District, Santa Rosalía, Mulegé Municipality, Baja California Sur, Mexico
1.27 carats
© Rarestone.com
Boleite forms deep blue cubes over half an inch on each side, which consist of pseudo-octahedral tetragonal dipyramids.
Soft, cleavable, twinned crystals of boleite are very difficult to facet.
Boleite Gemstones by Colour
This table shows the variety of hues this gemstone can be found in. Click on a photo for more information.
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| General Information | ||||||||||||||||||||||||||
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| Chemical Formula |
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| Photos of natural/un-cut material from mindat.org | ||||||||||||||||||||||||||
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| Physical Properties of Boleite | ||||||||||||||||||||||||||
| Mohs Hardness | 3 to 3.5, Gems, Sixth Edition (2006) More from other references | |||||||||||||||||||||||||
| Specific Gravity | 5.05, Gems, Sixth Edition (2006) More from other references | |||||||||||||||||||||||||
| Cleavage Quality | Perfect, Gems, Sixth Edition (2006) More from other references | |||||||||||||||||||||||||
| Fracture | Uneven, Gemstones (2009) | |||||||||||||||||||||||||
| Optical Properties of Boleite | ||||||||||||||||||||||||||
| Refractive Index | 2.05, Gems, Sixth Edition (2006) More from other references | |||||||||||||||||||||||||
| Optical Character | Uniaxial/-, Gemstones (2009) | |||||||||||||||||||||||||
| Birefringence | 0.010, Gemstones (2009) | |||||||||||||||||||||||||
| Dispersion | 0.071, Gemstones (2009) | |||||||||||||||||||||||||
| Colour | ||||||||||||||||||||||||||
| Colour (General) | Deep Prussian blue to indigo, Gems, Sixth Edition (2006) More from other references | |||||||||||||||||||||||||
| Transparency | Transparent,Translucent, Gemstones of the world (2001) More from other references | |||||||||||||||||||||||||
| Lustre | Vitreous,Pearly, Gemstones (2009) | |||||||||||||||||||||||||
| Crystallography of Boleite | ||||||||||||||||||||||||||
| Crystal System | Isometric, Gemstones of the world (2001) More from other references | |||||||||||||||||||||||||
| Habit | Pseudo-cubic, Gemstones (2009) | |||||||||||||||||||||||||
| Geological Environment | ||||||||||||||||||||||||||
| Where found: | Occurs as a secondary mineral formed by the reaction of chloride with primary sulphides in the oxidized zone of lead–copper deposits., Gems, Sixth Edition (2006) | |||||||||||||||||||||||||
| Further Information | ||||||||||||||||||||||||||
| Mineral information: | Boleite information at mindat.org | |||||||||||||||||||||||||
| Significant Gem Localities | ||||||||||||||||||||||||||
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