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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 safflorite, and siderite and more from places like Langis mine, Cobalt dist., Ontario, Canada, and Obercassel, Bonn, Siebengebirge, North Rhine-Westphalia, Germany.

Safflorite

with Nickeline - #RW48472
Locality
Langis mine, Cobalt dist., Ontario, Canada 
Formula
(Co,Fe,Ni)As2 
Availability
Available
Price
$225.00
Size
9 x 7 x 1.5 cm - Sm Cabinet 
Tagged
ore mineral , nickel  

A great ore specimen showing the arborecent crystallization of Safflorite in 1cm rods suspended in hard Calcite matrix. At the tips of the Safflorite is the remaining phase of Nickeline marking the depletion of cobalt. On the flip side you can see the alterations to probably Annabergite. It is a slice on one side. You will have endless hours of studying the ore development under the microscope.


Safflorite

Formula
(Co,Fe,Ni)As2 
Crystal System
Orthorhombic 
Crystal Habit
Radial, Massive - Granular 
Cleavage
Imperfect, None, None 
Luster
Metallic 
Color
gray, dark gray, tin white 
Streak
grayish black 
Class
Orthorhombic - Dipyramidal 
Fracture
Brittle 
Hardness
4-5 
Collection
Robert J. Waidler Collection

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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