Apophyllite is a mineral that has three varieties: fluorapophyllite, hydroxyapophyllite and natroapophyllite. Hydrothermal formation. Apophyllite is characterized by association with zeolites. The best collection samples of apophyllite come from India.
You can see apophyllite stone for sale and buy it in the Minerals of Russia online store.
General | |
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Category | Phyllosilicate |
Formula (repeating unit) |
(K,Na)Ca4Si8O20(F,OH)·8H2O |
IMA symbol | Apo |
Crystal system | Tetragonal |
Space group | P4/mnc |
Identification | |
Color | Usually white, colorless; also blue, green, brown, yellow, pink, violet |
Crystal habit | Prismatic, tabular, massive |
Cleavage | Perfect on (001) |
Fracture | Uneven |
Mohs scale hardness | 4.5 - 5 |
Luster | Vitreous; pearly |
Streak | White |
Diaphaneity | Transparent to translucent |
Specific gravity | 2.3 – 2.4 |
Refractive index | 1.536 |
Birefringence | 0.000 - 0.003 |
Pleochroism | Dichroic (colorless) |
Other characteristics | ![]() |