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  3. Azurite

Stone sphere balls - full range in stock "Azurite"

Azurite is a secondary copper mineral. It is a search sign of copper deposits, while it is itself used as copper ore. Known since ancient times. Its name is translated from Arabic as "blue". Served as a blue pigment for the manufacture of paints. Due to its rich blue color, azurite is one of the most beloved collectible minerals.

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

Physical properties of Azurite

General
Category Carbonate mineral
Formula
(repeating unit)		 Cu3(CO3)2(OH)2
IMA symbol Azu
Strunz classification 5.BA.05
Crystal system Monoclinic
Crystal class Prismatic (2/m)
(same H-M symbol)
Space group P21/c
Unit cell a = 5.01 Å, b = 5.85 Å
c = 10.35 Å; β = 92.43°; Z = 2
Identification
Formula mass 344.67 g/mol
Color Azure-blue, dark to pale blue; pale blue in transmitted light
Crystal habit Massive, prismatic, stalactitic, tabular
Twinning Rare, twin planes {101}, {102} or {001}
Cleavage Perfect on {011}, fair on {100}, poor on {110}
Fracture Conchoidal
Tenacity brittle
Mohs scale hardness 3.5 to 4
Luster Vitreous
Streak Light blue
Diaphaneity Transparent to translucent
Specific gravity 3.773 (measured), 3.78 (calculated)
Optical properties Biaxial (+)
Refractive index nα = 1.730 nβ = 1.758 nγ = 1.838
Birefringence δ = 0.108
Pleochroism Visible shades of blue
2V angle Measured: 68°, calculated: 64°
Dispersion relatively weak
Azurite, Malachite (sphere)
Code: 3939
Azurite, Malachite (sphere)
Stepnoe, Altai, RF
85mm

0.00 $ $480.00

Azurite, Malachite (sphere)
Code: 3940
Azurite, Malachite (sphere)
Stepnoe, Altai, RF
42mm

0.00 $ $123.33

Azurite (sphere)
Code: 2541
Azurite (sphere)
Stepnoe, Altai, RF
54mm

0.00 $ $160.00

Azurite
Code: 1017
Azurite
Stepnoe, Altai, RF
67mm

0.00 $ $263.00

Azurite, Malachite (sphere) archived
Code: 4723
Azurite, Malachite (sphere)
Stepnoe, Altai, RF
36mm

0.00 $ $72.00

Azurite, Malachite (sphere) archived
Code: 4158
Azurite, Malachite (sphere)
Stepnoe, Altai, RF
39mm

0.00 $ $116.67

Azurite, Malachite (sphere) archived
Code: 3942
Azurite, Malachite (sphere)
Stepnoe, Altai, RF
39mm

0.00 $ $116.67

Azurite, Malachite (sphere) archived
Code: 1841
Azurite, Malachite (sphere)
Stepnoe, Altai, RF
99mm

0.00 $ $465.00

Azurite, Malachite (sphere) archived
Code: 2280
Azurite, Malachite (sphere)
Stepnoe, Altai, RF
56mm

0.00 $ $196.67

Zarinite (sphere) archived
Code: 843
Zarinite (sphere)
Kamenushinsky deposit, Kemerovo region, South Siberia, RF
57mm

0.00 $ $73.33

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