Cancrinite
Canada
1.40 carats
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Cancrinite usually occurs in a massive form or as crystals of the hexagonal system. Light greyish purple, yellow, violet and orange Cancrinite has come from Canadian sources and a blue variety from Greenland.
A semi-opaque yellow-coloured fibrous variety of Cancrinite has been cut into cabochons and beads.
Cancrinite 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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| Cancrinite Treatments | ||||||||||||||||||||||||||||||
| Colorless material that has been reported to acquire blue veins on being irradiated with X-rays (Pough and Rogers, 1947). One assumes that this is the fibrous variety described by Webster . One would expect this change to be reversed by heat, and fading in light is also a possibility – Nassau (1984) | ||||||||||||||||||||||||||||||
| Physical Properties of Cancrinite | ||||||||||||||||||||||||||||||
| Mohs Hardness | 5 to 6, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||||||||||
| Specific Gravity | 2.42 to 2.52, 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 Cancrinite | ||||||||||||||||||||||||||||||
| Refractive Index | 1.491 to 1.524, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||||||||||
| Optical Character | Uniaxial/-, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||||||||||
| Birefringence | 0.022 to 0.026, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||||||||||
| Colour | ||||||||||||||||||||||||||||||
| Colour (General) | Yellow, orange, colourless, white, bluish, pink., Gemstones of the world (2001) More from other references | |||||||||||||||||||||||||||||
| Transparency | Transparent,Translucent, Gemstones of the world (2001) More from other references | |||||||||||||||||||||||||||||
| Lustre | Vitreous,Pearly, Gemstones (2009) | |||||||||||||||||||||||||||||
| Fluorescence & other light emissions | ||||||||||||||||||||||||||||||
| Fluorescence (General) | Inert, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||||||||||
| Fluorescence (X-RAY) | Orange-yellow response, Gems, Sixth Edition (2006) | |||||||||||||||||||||||||||||
| Crystallography of Cancrinite | ||||||||||||||||||||||||||||||
| Crystal System | Hexagonal, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||||||||||
| Habit | Fibrous aggregate, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||||||||||||||
| Geological Environment | ||||||||||||||||||||||||||||||
| Where found: | Cancrinite is found in pegmatites in nepheline syenites, Gems, Sixth Edition (2006) | |||||||||||||||||||||||||||||
| Further Information | ||||||||||||||||||||||||||||||
| Mineral information: | Cancrinite information at mindat.org | |||||||||||||||||||||||||||||
| Significant Gem Localities | ||||||||||||||||||||||||||||||
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