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  3. Lazulite

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

General
Category Phosphate mineral
Formula
(repeating unit)		 (Mg,Fe2+)Al2(PO4)2(OH)2
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
Identification
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

LazuLite
Code: 990
LazuLite
r.Dzhida, Buryatia, RF
83*56*20mm

0.00 $ $40.00

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