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Chondrodite Muscovite & Calcite

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MNT17019

Chondrodite Muscovite & Calcite

Ex H-J Wilke (Germany)

Description Tabs

Description
Locality: 
Pitkyaranta District, Ladoga Region, Karelia Republic, Russian Federation
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 6.7 × 4 cm
Description

Nice example from a rare locale: golden-yellowish to brown chondrodite grains (partly translucent) accompanied by muscovite in sparry calcite (metamorphic).

Resembles the norbergite from this locale but is proven by XRD as chondrodite.

Mineral Data
What's on the rock

Chondrodite

Formula: 
(Mg,Fe2+)5(SiO4)2(F,OH)2
Strunz: 
9.AF.45
Crystal System: 
Monoclinic
Hardness: 
6.0 - 6.5
Type Locality: 
Skräbböle quarry, Pargas (Parainen), Southwestern Finland Region, Finland

Muscovite

Formula: 
KAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.5
Streak: 
White

Calcite

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

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