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

Siderite mineral - You can buy these samples

Siderite is a mineral that has another name - "iron spar". Contains up to 48% iron and is mined as iron ore. Mostly found as earthy masses, but also forms crystals. Cleavage is perfect. When heated above 300 degrees C. blackens and becomes highly magnetic.
You can see siderite stone for sale and buy it in the Minerals of Russia online store.

Physical Properties of Siderite

General
Category Carbonate mineral
Formula
(repeating unit)
FeCO3
IMA symbol Sd
Strunz classification 5.AB.05
Dana classification 14.01.01.03
Crystal system Trigonal
Crystal class Hexagonal scalenohedral (3m)
H-M symbol: (3 2/m)
Space group R3c
Unit cell a = 4.6916, c = 15.3796 [Å]; Z = 6
Identification
Color Pale yellow to tanish, grey, brown, green, red, black and sometimes nearly colorless
Crystal habit Tabular crystals, often curved - botryoidal to massive
Twinning Lamellar uncommon on{0112}
Cleavage Perfect on {0111}
Fracture Uneven to conchoidal
Tenacity Brittle
Mohs scale hardness 3.75 - 4.25
Luster Vitreous, may be silky to pearly
Streak White
Diaphaneity Translucent to subtranslucent
Specific gravity 3.96
Optical properties Uniaxial (-)
Refractive index nω = 1.875 nε = 1.633
Birefringence δ = 0.242
Dispersion Strong
Code: 1041
2-d Soviet mine, Dalnegorsk, Primorye, RF
65*36*32mm

0.00 $ $30.55

Code: 1980
2-d Soviet mine, Dalnegorsk, Primorye, RF
53*46*41mm

0.00 $ $35.64

Code: 1005
2-d Soviet mine, Dalnegorsk, Primorye, RF
69*38*27mm

0.00 $ $32.36

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