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Manganoneptunite

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LMB169832

Manganoneptunite

Description Tabs

Description
Locality: 
Demix-Varennes Quarry, Varennes & St-Amable, Montérégie, Québec, Canada
Size Range: 
Thumbnail (1-3cm)
Size: 
2.2 × 1.1 × 1.3 cm
Description

The manganoneptunite xl spans 1¾ mm, which is probably a bit larger than average for the sill. But you will still need 15-20X to view it. As is typical here, the xl is well formed and lustrous, but very dark.

The tiny pink xls are eudialyte. The white plates are microcline and there is also a bit of acicular aegirine.

Weight 0.1 oz. Single item (small box) shipping weight 2.1 oz. Outside the USA, this could be mailed in a padded envelope for $7. Alternatively, it could be combined with other items up to a total weight < 4 oz for the same postage.

Mineral Data
What's on the rock

Manganoneptunite

Formula: 
Na2KLi(Mn2+,Fe2+)2Ti2[Si8O24]
Strunz: 
9.EH.05
Crystal System: 
Monoclinic
Hardness: 
5.0 - 6.0
Colour: 
Red
Type Locality: 
Maly Mannepakhk Mt (Malyi Mannepakhk Mt), Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...
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.