Petalite 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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Petalite Gemstones by Size
This table shows distribution of Petalite gemstone sizes that are listed on this site. This can give a good indication as to the general availability of this gemstone in different sizes.
Contributed photos
Lightest:3.25 cts
Heaviest:12.40 cts
Average:6.76 cts
Total photos:6
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| General Information | |||||||||||||||||||
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| Chemical Formula |
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| Physical Properties of Petalite | |||||||||||||||||||
| Mohs Hardness | 5.5, Gemmological Tables (2004) More from other references | ||||||||||||||||||
| Specific Gravity | 2.39 to 2.40, Gemmological Tables (2004) More from other references | ||||||||||||||||||
| Tenacity | Brittle, Blue Chart Gem Identification (2010) More from other references | ||||||||||||||||||
| Cleavage Quality | Perfect, Blue Chart Gem Identification (2010) More from other references | ||||||||||||||||||
| Fracture | Conchoidal, Gemstones (2009) | ||||||||||||||||||
| Optical Properties of Petalite | |||||||||||||||||||
| Refractive Index | 1.502 to 1.523, Blue Chart Gem Identification (2010) More from other references | ||||||||||||||||||
| Optical Character | Biaxial/+, Blue Chart Gem Identification (2010) More from other references | ||||||||||||||||||
| Birefringence | 0.012 to 0.016, Blue Chart Gem Identification (2010) More from other references | ||||||||||||||||||
| Pleochroism | Nil, Gemstones (2009) | ||||||||||||||||||
| Dispersion | 0.0141, Gemstones (2009) | ||||||||||||||||||
| Colour | |||||||||||||||||||
| Colour (General) | Colourless, yellowish, Gemmological Tables (2004) More from other references | ||||||||||||||||||
| Transparency | Transparent, Gemmological Tables (2004) More from other references | ||||||||||||||||||
| Lustre | Pearly, Blue Chart Gem Identification (2010) More from other references | ||||||||||||||||||
| Fluorescence & other light emissions | |||||||||||||||||||
| Fluorescence (General) | May react white to weak orange, Blue Chart Gem Identification (2010) More from other references | ||||||||||||||||||
| Crystallography of Petalite | |||||||||||||||||||
| Crystal System | Monoclinic, Blue Chart Gem Identification (2010) More from other references | ||||||||||||||||||
| Habit | Tabular crystals or masses, Gems, Sixth Edition (2006) More from other references | ||||||||||||||||||
| Geological Environment | |||||||||||||||||||
| Where found: | Petalite is a mineral of granite pegmatites where it may be found with other Li-minerals including spodumene and tourmaline group species., Gems, Sixth Edition (2006) | ||||||||||||||||||
| Further Information | |||||||||||||||||||
| Mineral information: | Petalite information at mindat.org | ||||||||||||||||||
| Significant Gem Localities | |||||||||||||||||||
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