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Heulandite

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QRC585624

Heulandite

Ex coll. S. Labanti
Classic Locality

Description Tabs

Description
Locality: 
Buffaure Group, Trento Province, Trentino-Alto Adige, Italy
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.5 × 6.5 × 7 cm
Largest Crystal: 
0.50cm
Weight: 
330.00gr
Description

Red-orange crystals of heulandite (up to 5 mm) richly cover a cavity of the basaltic matrix. Calcite was removed by a mild acid action (citric acid) in order to preserve the original colour of the crystals.

Old stuff from a classic Italian locality!

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

Seller Information

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Seller's terms and conditions

Minerals on auction are from worldwide locations, with a special focus on Italian classics.

Specimens offered are of high quality for different kinds of collectors and are always shown throught the best possible picture in order to present all their features.

Returns will be accepted within 15 days of receipt of goods. All we ask is that you contact us directly by e-mail within 15 days if the item(s) you receive has some problem. A refund for the purchase price less shipping will be issued as soon as we receive the item(s) back in unaltered condition . Please pack them to survive the trip. Sorry, shipping and insurance charges are not refundable. Postage for returned merchandise is at your cost.

Please note that we will not accept returns after 15 days, nor will we accept them unless we have first received notification from you of your intentions.