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Steenstrupine-(Ce)

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LMB527330

Steenstrupine-(Ce)

Rare Mineral

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Class: 
Massive/Crystalline
Size Range: 
Thumbnail (1-3cm)
Size: 
0.7 × 1.5 × 0.8 cm
Weight: 
1.00gr
Description

Steenstrupine-(Ce) is a very rare mineral at MSH, found only in sodalite xenoliths (and possibly some exceptional “xenolith like” environments).

This specimen features a single (ca 2 mm) very dark red blob, visible in all of the photos. FOV in the first two photos is 4.0 x 3.8 and 4.0 x 3.3 mm resp.) The second photo shows a relatively smooth area (highlighted) on one side of the blob. Probably this is a contact rather than a face, but it’s hard to be sure.

Note: Hisingerite and neotocite can look similar, but are only found as replacements or crusts in altered pegmatites, and are generally not embedded in sodalite. In this case the matrix is clearly sodalite (it fluoresces orange LW) and it appears to be from a sodalite xenolith. But the sample is too small to be absolutely sure.

Single item shipping weight is 2.8 oz. If you are planning to hold an "open box" so as to reduce postage costs by combining items from a future auction, please note that USPS postage rates recently changed significantly.

Outside the USA, the stated postage and packing rate applies up to a total weight of 8 oz (225 g). It is no longer possible to save on postage by using a padded envelope.

Within the USA, there is a nominal increase of $0.20 for each additional ounce. Above 13 oz, I will use Priority Mail. Up to 16 oz, the “own box” Priority rate is $8.50 (including packing).

Please see my "Shipping Policy" for details. 

Mineral Data
What's on the rock

Steenstrupine-(Ce)

Formula: 
Na14Mn2+2(Fe3+,Mn3+)2Ce6(Zr,Th)(Si6O18)2(PO4)6(HPO4)(OH)2·2H2O
Strunz: 
9.CK.20
Hardness: 
4.0
Type Locality: 
Kangerluarsuk Fjord (Kangerdluarssuq Fjord), Ilímaussaq complex, Narsaq, Kujalleq, Greenland
LMB minerals

Seller Information

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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.