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Fluorapophyllite Var Albin

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MNT676239

Fluorapophyllite Var Albin

Classic Locality

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Description
Locality: 
Mariánská Skála, Ústí nad Labem District, Ústí nad Labem Region, Czech Republic
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 5.3 × 2.6 cm
Description

A nice old time classic from Usti nad Labem: specimen with whiteish fluorapophyllite crystals (variety albine) in a vug of volcanic host rock with some calcite on a lawn of natrolite. Comes with two labels: an older cut one and one from Dr. B. Stürtz, Bonn (after 1919).

Mineral Data
What's on the rock

Fluorapophyllite

Synonym Of: 

Fluorapophyllite-(K)

Formula: 
KCa4(Si8O20)(F,OH)·8H2O
Strunz: 
9.EA.15
Hardness: 
4.5 - 5.0

Fluorapophyllite-(Na)

Formula: 
NaCa4(Si8O20)F·8H2O
Strunz: 
9.EA.15
Hardness: 
4.0 - 5.0

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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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