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Nenadkevichite & Rhodochrosite

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LMB178910

Nenadkevichite & Rhodochrosite

Rare Mineral

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Size Range: 
Thumbnail (1-3cm)
Size: 
1.4 × 1.6 × 1.1 cm
Description

Very pretty, but very tiny (<= 0.4 mm), pink-violet, tabular xls of nenadkevichite on rhodochrosite. FOV in the fist photo is 1.3 x 1.8 mm. You will need 20-40X to view the xls. (But the largest nenadkevichite is actually visible on the right even in the macro photo.) The matrix is albite with aegirine.

Weight 0.2 oz (including MM case). Single item shipping weight 2.2 oz. Up to a total weight < 4 oz, this can be combined with other items for the same postage. Alternatively, outside the USA, this could be sent in a padded envelope for $7.

Mineral Data
What's on the rock

Nenadkevichite

Formula: 
(Na,◻)8Nb4(Si4O12)2(O,OH)4·
Strunz: 
9.CE.30a
Hardness: 
5.0
Type Locality: 
Natrolite Stock (Pegmatite No. 61), Karnasurt Mt, Lovozero Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia...

Rhodochrosite

Formula: 
MnCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.0
Streak: 
White
Type Locality: 
Cavnic Mine (Kapnikbánya), Cavnic (Kapnic; Kapnik), Maramureș Co., Romania
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.