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

Polished stones - full range in stock "Nepheline"

Nepheline is a rock-forming mineral rarely found in crystals.

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

Physical properties of Nepheline

Category Tectosilicate, feldspathoid
(repeating unit)
IMA symbol Nph
Strunz classification 9.FA.05
Crystal system Hexagonal
Crystal class Pyramidal (6)
H-M Symbol: (6)
Space group P63
Formula mass 146.08 g/mol
Color White, gray, brown, brownish gray, or reddish white
Crystal habit Massive granular to prismatic
Twinning On [1010], [3365], and [1122]
Cleavage [1010] Poor
Fracture Subconchoidal
Mohs scale hardness 6
Luster Vitreous to greasy
Streak White
Specific gravity 2.55–2.65 (average: 2.59)
Optical properties Uniaxial (-)
Refractive index nω = 1.529–1.546; nε = 1.526–1.542
Birefringence δ = 0.003–0.004
Other characteristics non-radioactive, non-magnetic, non-fluorescent

Code: 3497/19А
Marchenko Peak, Khibiny, Kola Peninsula, RF

0.00 $ $220.00

Code: 2544
Marchenko Peak, Khibiny, Kola Peninsula, RF

0.00 $ $19.00

Code: 2207
Marchenko Peak, Khibiny, Kola Peninsula, RF

0.00 $ $19.00

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