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Mixed Minerals

Friday, 23 February 2018 06:30 PM

Introducing the "Mixed Minerals" gallery which is part of our New Additions galleries. This gallery contains mineral specimens for sale including siderite and more from places like Obercassel, Bonn, Siebengebirge, North Rhine-Westphalia, Germany.

Siderite

with Chalcopyrite - #48433
Locality
Obercassel, Bonn, Siebengebirge, North Rhine-Westphalia, Germany 
Formula
FeCO3 
Availability
Available
Price
$195.00
Size
7 x 8 x 5 cm - Sm Cabinet 
Tagged
carbonate  

An old-timer from the University of Chicago with tag purchased by Charles Noll from another collector. It is handsome specimen with large curved rhombic crystals to 9mm topped off with Chalcopyrite crystals to 1cm. 


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 
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