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Siderite

#PD31054

Siderite

#PD31054
Availability
Sold
Size
5 x 3.5 x 3 cm - Miniature 
Formula
FeCO3 (RRUFF)
Locality
Tincroft mine, Redruth dist., Cornwall, England
Tagged
carbonate

The Tincroft mine at Redruth was an old, 18th century mine having produced copper in the early years and converted to tin in 1865 as the geological zones changed at depth according to Embrey and Symes (1987). Cornwall is a classic example of metal zoning. The Redruth area around Carn Brea granite was the focal point of early Cornish mining with greater then 100 mines. The district is divided in two with the northern part hosting the famous mines of Dolcoath, Cook's Kitchen, South Crofty, Carn Brea and this mine, the Tincroft. Dolcoath, according to Embrey and Symes (1987) was the deepest and most famous of all the Cornish mines. A specimen such as this in any collection is rewarding and satisfying knowing that you have a piece of history from this legendary district. The Tincroft mine is known for its Siderite, Torbernite and Hematite. This specimen is fabulous with perhaps two generations of Siderite, the first as an epimorphic cast over a later re-deposited lighter brown zoned Siderite. The rhombic crystals measure 8mm. David New label.

Siderite

Formula
FeCO3 
Crystal System
Trigonal 
Crystal Habit
Tabular, Massive, Botryoidal 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
yellowish brown, brown, gray, yellowish gray, greenish gray 
Streak
white 
Class
Trigonal - Hexagonal Scalenohedral 
Fracture
Brittle - Conchoidal 
Hardness
3.5 

Data courtesy of Webmineral.

Collection
Phillips Collection
Mineralpedia
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Previously Sold Siderite
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Other Available Siderite
WebMineral
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Mindat
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