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Geyerite & Quartz

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MNT632189

Geyerite & Quartz

ex Bodo Moniac (GER)
Classic Locality

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Description
Locality: 
Greifenstein Adit, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4 × 3.4 × 2.3 cm
Description

From the Bodo Moniac collection comes this sample with arsenopyrite/geyerite and quartz. Label states Geyerite which is sensu strictu a variety of Löllingite where some As is replaced by S. The crystal shape is more like arsenopyrite though and is in line with the old description of Geyerite from Ehrenfriedersdorf. Analysis would be needed for exact ID.

Mineral Data
What's on the rock

Geyerite

Variety Of: 

Löllingite

Formula: 
FeAs2
Strunz: 
2.EB.15a
Hardness: 
5.0 - 5.5
Formula: 
Fe(As,S)2
Hardness: 
0.0

Quartz

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

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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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