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

Polished stones - full range in stock "Magnetite"

Magnetite (magnetic iron ore) is a widespread mineral, natural iron oxide. It may or may not have magnetic properties; occur both in crystals and in solid masses. It is an important iron ore.

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

Physical properties of Magnetite

General
Category
  • Oxide minerals
  • Spinel group
  • Spinel structural group
Formula
(repeating unit)
iron(II,III) oxide, Fe2+Fe3+2O4
IMA symbol Mag
Strunz classification 4.BB.05
Crystal system Isometric
Crystal class Hexoctahedral (m3m)
H-M symbol: (4/m 3 2/m)
Space group Fd3m
Unit cell a = 8.397 Å; Z = 8
Identification
Color Black, gray with brownish tint in reflected sun
Crystal habit Octahedral, fine granular to massive
Twinning On {Ill} as both twin and composition plane, the spinel law, as contact twins
Cleavage Indistinct, parting on {Ill}, very good
Fracture Uneven
Tenacity Brittle
Mohs scale hardness 5.5–6.5
Luster Metallic
Streak Black
Diaphaneity Opaque
Specific gravity 5.17–5.18
Solubility Dissolves slowly in hydrochloric acid
References [2][3][4][5]
Major varieties
Lodestone Magnetic with definite north and south poles
Code: 1658
Iron mine, Kovdor, Kola Peninsula, RF
79*41*22mm

0.00 $ $29.09

Code: 920
Iron mine, Kovdor, Kola Peninsula, RF
98*56*12mm

0.00 $ $36.36

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