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Magnetite & Quartz

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BMM706493

Magnetite & Quartz

Description Tabs

Description
Locality: 
Kovdor Massif, Murmansk Oblast, Russian Federation
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.9 × 5.5 × 4.5 cm
Description

Lustrous sharp black octahedral crystals of magnetite, 2.3 cm in size in combination with small quartz crystals and calcite. The specimen shows a well-formed main crystal and many smaller crystals which are also well crystallized. The specimen stands in the displayed position without support (first and third photo).

Mineral Data
What's on the rock

Magnetite

Formula: 
Fe2+Fe3+2O4
Strunz: 
4.BB.05
Crystal System: 
Isometric
Hardness: 
5.5 - 6.5
Streak: 
Black

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White