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Scheelite & Wolframite

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MNT681950

Scheelite & Wolframite

ex Dr. F. Krantz, Bonn, GER; ex ?
Classic Locality

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Description
Locality: 
Cínovec/Zinnwald, Teplice, Ústí nad Labem Region, Czech Republic
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.3 × 2.1 × 1.7 cm
Description

Erzgebirge classic: blackish metallic lustrous wolframite hosts a mass of crystalline beige-brownish scheelite with crystal faces. SW UV is more yellowish on the rims and blueish at the cores of the aggregate. In the picture the blue dominates. Label probably reused as generic Zinnwald scheelite label.

Mineral Data
What's on the rock

Scheelite

Formula: 
Ca(WO4)
Strunz: 
7.GA.05
Crystal System: 
Tetragonal
Hardness: 
4.5 - 5.0
Streak: 
White
Type Locality: 
Bispbergs Klack, Säter, Dalarna, Sweden

Wolframite

Synonym Of: 

Hübnerite

Formula: 
MnWO4
Strunz: 
4.DB.30
Hardness: 
4.0 - 4.5

Ferberite

Formula: 
FeWO4
Strunz: 
4.DB.30
Hardness: 
4.0 - 4.5
Formula: 
(Fe2+)WO4 to (Mn2+)WO4
Crystal System: 
Monoclinic
Hardness: 
4 - 4.5
Colour: 
Greyish-black
Streak: 
Reddish Brown

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Terms & Conditions

Thank you for your interest in my offers! Payment is possible via Paypal, bank transfer or cash if you pick up the item(s) personally. Bank data will be provided after settling the auction/transaction(s) if needed.

In case you are not happy with a specimen, you may send it back within 4 weeks. After receipt, i will refund the price minus shipping costs. Please inform me before sending an item back. If you have any questions (or maybe complaints) please feel free to contact me.

Best regards Roger

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