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Manganoneptunite & Sérandite

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LMB164637

Manganoneptunite & Sérandite

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.5 × 3.3 × 0.7 cm
Description

Small, but nice, deep amber, manganoneptunite xls with pink/orange sérandite. FOV in the close-up photos is 6.1 x 4.2 mm and 6.9 x 4.5 mm. The largest manganoneptunite xl is about 2 mm (not quite all of which is visible). You will need10-20X to view the xls. Flipping back and forth between the close-up photos provides a sort of "3D" feel.

Most of the specimen consists of sérandite, but it is almost all just cleavages. There are only a few small gemmy sérandite xls. These xls are roughly right of center in the macro photo.

Other things on the specimen include aegirine (two generations), bits of polylithionite, albite and “mud”.

Weight 0.7 oz. Single item shipping weight 2.7 oz. Up to <= 4 oz, this could be combined with other items 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...

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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