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Yofortierite

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LMB165750

Yofortierite

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Description
Locality: 
Demix-Varennes Quarry, Varennes & St-Amable, Montérégie, Québec, Canada
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2 × 3 × 1 cm
Description

The Demix-Varrenes quarry is a good place to find yofortierite – it is fairly common here. This somewhat disheveled group of three spays is fairly typical. The pale green spray at the bottom is aegirine.

While the main photo spans 5.4 x 3.8 mm, and the yofortierite is naked eye visible, this is really a micro specimen (10X).

Note: Horváth has recently reported that tuperssuatsiaite (which is visually almost indistinguishable) has turned out to be more common at this quarry that previously thought. The one visual hint appears to be a lighter color. This specimen has not been analyzed, but it has the “classic” bronzy color of yofortiertite from here.

Weight 0.3 oz.

Mineral Data
What's on the rock

Yofortierite

Formula: 
Mn5Si8O20(OH)2·8-9H2O
Strunz: 
9.EE.20
Hardness: 
0.0
Type Locality: 
Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
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.

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