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Calcite Quartz & Biotite

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MNT926443

Calcite Quartz & Biotite

Classic Locality

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Description
Locality: 
Sedrun, Tujetsch, Surselva Region, Grisons, Switzerland
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.1 × 4.7 × 2.6 cm
Weight: 
74.00gr
Description

Specimens from the NEAT tunnel are not really abundant. This interesting combo comes from the Faido tunnel section and features calcite with dark biotite crystals on quartz crystals with a small yellow seemingly twinned titanite(?) or sphalerite(?) on gneissic matrix.

Mineral Data
What's on the rock

Calcite

Polymorph of: 
Aragonite and Vaterite
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

Quartz

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

Biotite

Group Parent: 
Mica Group

Seller Information

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Seller's terms and conditions

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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