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Heulandite & Scolecite

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MNT781159

Heulandite & Scolecite

ex P. Muhl collection, Herdirf, GER
Classic Locality

Description Tabs

Description
Locality: 
Das Antas Tunnel, Veranópolis, Rio Grande do Sul, Brazil
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.3 × 5.8 × 4.8 cm
Description

Older classic from Brazil: samlon coloured heulandite crystals with some acicular scolecite(?) on amygdaloid basaltic matrix from Das Antas, ex P. Muhl collection (Herdorf, GER). Base sawn!

Mineral Data
What's on the rock

Heulandite

Synonym Of: 

Heulandite-Ba

Formula: 
(Ba,Ca,K,Na,Sr)5Al9Si27O72·22H2O
Strunz: 
9.GE.05
Hardness: 
3.5

Heulandite-Ca

Formula: 
(Ca,Na)2-3Al3(Al,Si)2Si13O36·12H2O
Strunz: 
9.GE.05
Hardness: 
3.5 - 4.0

Heulandite-K

Formula: 
(K,Na,Ca)2-3Al3(Al,Si)2Si13O36·12H2O
Strunz: 
9.GE.05
Hardness: 
3.0 - 3.5

Heulandite-Na

Formula: 
(Na,Ca)2-3Al3(Al,Si)2Si13O36·12H2O
Strunz: 
9.GE.05
Hardness: 
3.0 - 3.5

Heulandite-Sr

Formula: 
(Sr,Na,Ca)2-3Al3(Al,Si)2Si13O36·12H2O
Strunz: 
9.GE.05
Hardness: 
3.0 - 3.5
Hardness: 
3 - 3.5
Colour: 
White
Streak: 
White

Scolecite

Formula: 
CaAl2Si3O10·3H2O
Strunz: 
9.GA.05
Hardness: 
5.0 - 5.5
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