Apophyllite Group 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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Apophyllite Group Gemstones by Size
This table shows distribution of Apophyllite Group 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:3.04 cts
Heaviest:6.77 cts
Average:4.51 cts
Total photos:4
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| General Information | ||||||||||||||||||
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| Chemical Formula |
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| Apophyllite Group Treatments | ||||||||||||||||||
| Colorless material has been reported by Plough (1957) to turn green on irradiation. Heat could be expected to reverse this change - Nassau, 1984 | ||||||||||||||||||
| Physical Properties of Apophyllite Group | ||||||||||||||||||
| Mohs Hardness | 4.5 to 5, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||
| Specific Gravity | 2.33 to 2.44, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||
| Cleavage Quality | Perfect, Blue Chart Gem Identification (2010) Easy and perfectMore from other references | |||||||||||||||||
| Fracture | Uneven, Gemstones (2009) | |||||||||||||||||
| Optical Properties of Apophyllite Group | ||||||||||||||||||
| Refractive Index | 1.530 to 1.543, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||
| Optical Character | Uniaxial/+,-, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||
| Birefringence | 0.000 to 0.003, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||
| Dispersion | High, Gemstones (2009) | |||||||||||||||||
| Colour | ||||||||||||||||||
| Colour (General) | White, colourless, bluish, reddish, yellowish, greenish, Gemmological Tables (2004) More from other references | |||||||||||||||||
| Causes of Colour | Green, V4+ in distorted octahedral coordination, Pragmatic Spectroscopy For Gemologists (2011) | |||||||||||||||||
| Transparency | Transparent,Translucent,Opaque, Gemmological Tables (2004) More from other references | |||||||||||||||||
| Lustre | Pearly, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||
| Crystallography of Apophyllite Group | ||||||||||||||||||
| Crystal System | Tetragonal, Blue Chart Gem Identification (2010) More from other references | |||||||||||||||||
| Habit | Tabular, prismatic, pseudo-cubic, Gemstones (2009) | |||||||||||||||||
| Geological Environment | ||||||||||||||||||
| Where found: | Apophyllite occurs in basalts and granites, Gems, Sixth Edition (2006) | |||||||||||||||||
| Further Information | ||||||||||||||||||
| Mineral information: | Apophyllite Group information at mindat.org | |||||||||||||||||