Petalite
Skardu Area, Gilgit-Baltistan, Pakistan
11.65 carats
© Rarestone.com
Well-formed crystals are rare, it is usually found in its massive form. Stones with colour are sometimes cut into cabochons. Cut petalite stones exhibit a glassy appearance and can be confused with Glass.
Petalite cat's eye is known.
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:0.33 cts
Heaviest:12.40 cts
Average:3.94 cts
Total photos:19
Do you have a larger Petalite? Why not upload a photo?
| General Information | ||||||||||||||||||||||||
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| Chemical Formula |
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| Physical Properties of Petalite | ||||||||||||||||||||||||
| Mohs Hardness | 6 to 6.5, Gemstones of the world (2001) More from other references | |||||||||||||||||||||||
| Specific Gravity | 2.40, Gemstones of the world (2001) 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 of the world (2001) More from other references | |||||||||||||||||||||||
| 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 | Absent, Gemstones of the world (2001) More from other references | |||||||||||||||||||||||
| Dispersion | 0.0141, Gemstones (2009) | |||||||||||||||||||||||
| Colour | ||||||||||||||||||||||||
| Colour (General) | Colourless, pink, yellowish, Gemstones of the world (2001) 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 | Thick tabular, columnar and aggregates, Gemstones of the world (2001) 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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