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  3. Rhodonite

Polished stones - full range in stock "Rhodonite"

Rhodonite (ruby spar or orlets) is a widespread low-temperature mineral. Contains manganese, which determines its color. It is unstable to weathering, while becoming covered with black crusts or veins. As a rule, it occurs in the form of solid masses, but it also forms crystals, which are quite rare and are a valuable collection mineral.


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

Physical properties of Rhodonite

General
Category Inosilicate
Formula
(repeating unit)		 (Mn2+,Fe2+,Mg,Ca)SiO3
IMA symbol Rdn
Strunz classification 9.DK.05
Dana classification 65.04.01.01
Crystal system Triclinic
Crystal class Pinacoidal (1)
(same H-M symbol)
Space group P1
Unit cell a = 9.758 Å, b = 10.499 Å, c = 12.205 Å; α = 108.58°, β = 102.92°, γ = 82.52°; Z = 20
Identification
Color Pink, rose-pink to brownish red, red, gray and yellow
Crystal habit Tabular crystals, massive, granular
Twinning Lamellar, composition plane {010}
Cleavage Perfect on {110} and {110}, (110) ^ (110) = 92.5°; good on {001}
Fracture Conchoidal to uneven
Mohs scale hardness 5.5–6.5
Luster Vitreous to pearly
Streak White
Diaphaneity Transparent to translucent
Specific gravity 3.57–3.76
Optical properties Biaxial (+)
Refractive index nα = 1.711–1.738, nβ = 1.714–1.741, nγ = 1.724–1.751
Birefringence δ = 0.013
Pleochroism Weak
2V angle 58° to 73° (measured), 58° (calculated)
Alters to Exterior commonly black from manganese oxides
Rhodonite
Code: 4026
Rhodonite
Borodulino deposit, middle Urals, RF
79*42*15mm

0.00 $ $31.67

Rhodonite archived
Code: 4027
Rhodonite
Borodulino deposit, middle Urals, RF
77*48*20mm

0.00 $ $33.33

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