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Wöhlerite Natrolite & Zircon

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LMB522230

Wöhlerite Natrolite & Zircon

ex Horváth
Rare Mineral

Description Tabs

Description
Locality: 
Mont Saint Hilaire, Québec, Canada
Class: 
Crystals on Matrix
Size Range: 
Micromount (under 1cm)
Size: 
0.6 × 0.3 × 0.3 cm
Largest Crystal: 
0.15cm
Weight: 
1.00gr
Description

Wöhlerite is very rare at MSH. Crystals can reach 5 mm, but most are much smaller.

This is is a very small specimen with two good sized, but partial, crystals in parallel growth (the typical habit at MSH). Ex Horváth collection, so the ID should be good. (The specimen is mounted in a micro box and comes with all the original labels.)

FOV in the first pair of photos is 2.4 x 3.0 mm. At this angle, the top crystal measures about 1 1/4 mm, but the view is considerably foreshortened.

FOV in the second pair of photos is 1.4 x 2.1 mm.

The thurd pair of photos (FOV 4.5 x 6.7 mm) shows the entire specimen. The wöhlerite crystals are about 1.5 mm long (but are still substantially foreshortened in the photo due to the angle). The white crystal (3.2 mm) is natrolite, probably with an outer crust of gonnardite. The tan crystals are small zircon di-pyramids. Everything sits on microcline.

Single item shipping weight (with TN case) is 3.1 oz (88g). For shipments outside the USA, up to a total weight < 8 oz (225g), this can be combined with other items from this or other auctions for the same postage. If you don’t need the TN case, you can save about 0.3 oz in  weight which could be used for something else.

Within the USA, postage now varies by destination. For total weights up to 13 oz, it ranges from $4.50 to $7.00 (including packing etc). Above 13 oz (up to 16 oz), I will use “own box” Priority Mail. The rate, including packing, varies from $8 to $10.

Mineral Data
What's on the rock

Wöhlerite

Formula: 
NaCa2(Zr,Nb)(Si2O7)(O,OH,F)2
Strunz: 
9.BE.17
Hardness: 
5.5 - 6.0
Type Locality: 
Løvøya (Løvø; Lövö; Lövöe), Langesundsfjorden, Porsgrunn, Telemark, Norway

Natrolite

Formula: 
Na2Al2Si3O10·2H2O
Strunz: 
9.GA.05
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Hohentwiel, Singen, Hegau, Baden-Württemberg, Germany

Zircon

Formula: 
ZrSiO4
Strunz: 
9.AD.30
Crystal System: 
Tetragonal
Hardness: 
7.5
Streak: 
White

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

Seller's terms and conditions

In addition to the standard terms and conditions, please note the following. Almost all IDs are visual. While in most cases the ID is obvious, there may be cases where it is not. If you are doubtful about a particular ID, please ask for more information. Or do not bid! Similarly, if you are not sure that the specimen meets your criteria, do not bid. I have tdone the best I can with the photos. Nevertheless, if you are not happy with a specimen for any reason, I will refund the bid price – but not the shipping costs (unless the fault is clearly mine) – if the specimen is returned. This policy applies even if analysis of the specimen shows that my ID was incorrect. When in doubt, ask - or don’t bid. Note that most crystals at MSH and Varennes are micros - even if on large specimens. Please pay attention to the stated sizes. Any customs duties, fees etc. are the responsibility of the buyer.

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