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Gmelinite-Na

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LMB546016

Gmelinite-Na

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Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
1.4 × 3 × 1.3 cm
Largest Crystal: 
0.17cm
Weight: 
9.00gr
Description

It can be very hard to distinguish gmelinite from chabazite at MSH. These small (<= 1.7 mm) “fuzz balls”, where initially thought to be chabazite due to similarity with known (analyzed) chabazite specimens found many years ago by the Horváths. But EDS on another specimen from this find pointed to gmelinite (see the “Analysis” tab), and this has now been confirmed via PXRD. More (expensive) analysis would be required to absolutely prove that this is gmelinite-Na, but, time-after-time, all detailed analyses of “gmelinite” from MSH have shown gmelinite-Na.

FOV in the close-up photo is 6.2 x 4.6 mm. The background  is microcline.

Single item shipping weight (small box with TN case) is 2.4 oz. Up to a total weight of 8 oz (225 g), this could be combined with other items from this or future auctions for the same postage. If you wish to keep an “open box”, let me know. Please see my "Shipping Policy" for details.

Mineral Data
What's on the rock

Gmelinite-Na

Formula: 
(Na2,Ca)[Al2Si4O12]·6H2O
Strunz: 
9.GD.05
Crystal System: 
Hexagonal
Hardness: 
4.5
Type Locality: 
Nero Mt., San Pietro, Montecchio Maggiore, Vicenza Province, Veneto, Italy
Analysis
Analysis Report - only: Gmelinite-Na
LMB minerals

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.