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  3. Bornite

Collectible minerals - full range in stock "Bornite"

Bornite is a relatively rare copper and iron mineral of variable composition. A chipped mineral in air quickly oxidizes and becomes covered with a tint film. It usually occurs in the form of solid masses. Crystals are rare and irregular.

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

Physical properties of Bornite

General
Category Sulfide mineral
Formula
(repeating unit)		 Cu5FeS4
IMA symbol Bn
Strunz classification 2.BA.10
Crystal system Orthorhombic
Crystal class Dipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)
Space group Pbca
Unit cell a = 10.95 Å, b = 21.862 Å,
c = 10.95 Å; Z = 16
Identification
Formula mass 501.88 g/mol
Color Copper red, bronze brown, purple
Crystal habit Granular, massive, disseminated – Crystals pseudocubic, dodecahedral, octahedral
Twinning Penetration twins on [111]
Cleavage Poor on [111]
Fracture Uneven to subconchoidal; brittle
Tenacity Brittle
Mohs scale hardness 3–3.25
Luster Metallic if fresh, iridescent tarnish
Streak Grayish black
Specific gravity 5.06–5.08
Refractive index Opaque
Pleochroism Weak but noticeable
Other characteristics Magnetic after heating, iridescent
Bornite
Code: 1335
Bornite
Dashkesan, Azerbaijan
41*39*21mm

0.00 $ $19.67

Bornite archived
Code: 3343
Bornite
Dashkesan, Azerbaijan
42*32*12mm

0.00 $ $12.00

Bornite archived
Code: 3344
Bornite
Dashkesan, Azerbaijan
33*31*18mm

0.00 $ $12.00

Bornite archived
Code: 2418
Bornite
Dashkesan, Azerbaijan
40*30*21mm

0.00 $ $16.33

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