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

Polished stones - full range in stock "Lazulite"

Lazulite is a blue hydrothermal mineral, as the name implies. Produced in small quantities. It occurs as a rule in the form of continuous masses, in crystals - rarely.

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

Physical properties of Lazulite

Category Phosphate mineral
(repeating unit)
IMA symbol Lzl
Strunz classification 8.BB.40
Crystal system Monoclinic
Crystal class Prismatic (2/m)
(same H-M symbol)
Space group P21/c
Unit cell a = 7.144(1), b = 7.278(1)
c = 7.228(1) [Å]; β = 120.5(1)°; Z = 2
Color Azure-blue, sky-blue, bluish white, yellow-green, blue-green, rarely green
Crystal habit Tabular, acute to stubby bipyramidal crystals; granular, massive
Twinning Common by several twin laws
Cleavage Poor to good on {110}, indistinct on {101}
Fracture Uneven, splintery
Tenacity Brittle
Mohs scale hardness 5.5 - 6.0
Luster Vitreous
Streak White
Diaphaneity Transparent to translucent to nearly opaque
Specific gravity 3.122 – 3.240
Optical properties Biaxial (-)
Refractive index nα = 1.604 - 1.626 nβ = 1.626 - 1.654 nγ = 1.637 - 1.663
Birefringence δ = 0.033 - 0.037
Pleochroism Strong: X= colorless, Y= blue, Z= darker blue
2V angle Measured: 61° to 70°
Fusibility Infusible
Solubility Insoluble

Code: 990
r.Dzhida, Buryatia, RF

0.00 $ $40.00

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