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Leucophanite & Ancylite & Sérandite

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LMB164221

Leucophanite & Ancylite & Sérandite

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Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.5 × 4 × 3 cm
Largest Crystal: 
0.22cm
Description

The main photo shows very pale gray/green leucophanite (~ 2¼ mm on edge) on sérandite laths. The second photo (FOV 6.4 x 4.2 mm) shows fairly good, gray/violet ancylite prisms to ~ 1½ mm on a few more “OK” xls of sérandite.

There is plenty of pink sérandite, but apart from the area surrounding the leucophanite, it is mostly just cleavages. Essentially, this is a micro – not a display piece. You will need 10X to see the xls clearly.

Note: The apparent color of ancylite depends on the light source – here tungsten. Also, visual ID of ancylite-(Ce) vs calcioancylite-(Ce) is not reliable at MSH.

Weight 0.7 oz.

Mineral Data
What's on the rock

Leucophanite

Formula: 
NaCaBeSi2O6F
Strunz: 
9.DH.05
Hardness: 
4.0
Streak: 
white
Type Locality: 
Låven (Skådön; Lamö; Lamanskjaer), Langesundsfjorden, Larvik, Vestfold, Norway

Ancylite

Synonym Of: 

Ancylite-(Ce)

Formula: 
SrCe(CO3)2(OH)·H2O
Strunz: 
5.DC.05
Hardness: 
4.0 - 4.5

Ancylite-(La)

Formula: 
Sr(La,Ce)(CO3)2(OH)·H2O
Strunz: 
5.DC.05
Hardness: 
4.0 - 4.5

Sérandite

Formula: 
Na(Mn2+,Ca)2(HSi3O9)
Strunz: 
9.DG.05
Hardness: 
5.0 - 5.5
Streak: 
White
Type Locality: 
Rouma Island (Roume Island; Roma Island; Ruma Island), Los Archipelago (Los Islands), Guinea
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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