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Diameter, mm (1mm - 0,039inch)

Astrophyllite mineral - You can buy these samples

Astrophyllite is an igneous mineral whose name comes from the Greek for "star". The best astrophyllite in the world is mined in Russia, in the Khibiny. It has no practical application, but is appreciated by jewelers.

You can see astrophyllite stone for sale and buy it in the Minerals of Russia online store.

Physical properties of Astrophyllite

General
Category Inosilicates
Astrophyllite group
Formula
(repeating unit)
(K,Na)3(Fe++,Mn)7Ti2Si8O24(O,OH)7
IMA symbol Ast
Strunz classification 9.DC.05
Crystal system Triclinic
Crystal class Pinacoidal (1)
(same H-M symbol)
Space group A1
Identification
Color Golden brown to yellow; rarely greenish
Crystal habit Tabular to bladed, radiating, stellate aggregates; lamellar masses
Cleavage Perfect on [001] imperfect on [100]
Fracture Uneven
Mohs scale hardness 3-4
Luster Greasy, pearly, sub-metallic
Streak Yellowish brown or white
Diaphaneity Translucent to opaque
Specific gravity 3.2–3.4
Optical properties Biaxial positive
Refractive index nα = 1.680 nβ = 1.700 nγ = 1.730
Birefringence 0.050
Pleochroism Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow

Code: 3688
Khibiny, Kola Peninsula, RF
36*34*10mm

0.00 $ $23.64

Code: 3689
Khibiny, Kola Peninsula, RF
51*45*29mm

0.00 $ $43.64

Code: 1866
Russia, RF
95*76*57mm

0.00 $ $363.64

Code: 922
Khibiny, Kola Peninsula, RF
118*64*27mm

0.00 $ $50.91

Code: 3341
Khibiny, Kola Peninsula, RF
60*31*30mm

0.00 $ $61.09

Code: 1903
Khibiny, Kola Peninsula, RF
81*60*24mm

0.00 $ $60.00

Code: 1343
Khibiny, Kola Peninsula, RF
72*36*38mm

0.00 $ $85.45

Code: 2131
Kirovsky mine, Khibiny, Kola Peninsula, RF
55*38*11mm

0.00 $ $21.45

Code: 2229
Khibiny, Kola Peninsula, RF
52mm

0.00 $ $138.18

Code: 2130
Kirovsky mine, Khibiny, Kola Peninsula, RF
48*30*22mm

0.00 $ $32.73

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