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Rhodochrosite Psm Eudialyte Group

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LMB527332

Rhodochrosite Psm Eudialyte Group

Pseudomorph

Description Tabs

Description
Locality: 
Poudrette Quarry, Mont Saint-Hilaire, Québec, Canada
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.9 × 2.5 × 1.6 cm
Weight: 
6.00gr
Description

MSH is well known for many unusual and even strange pseudomorphs. This small example features several pseudomrphs of rhodochrosite (probably) after an eudialyte group minerfal. The pseudomorphs are embedded in matrix and most are broken 

The best preserved “crystal” is shown in the first three photos (as well as the full-view). It appears to be a slightly “stretched” pseudo-octahedron with longest edges about 3.2 mm. There are several other pseudomorphs, some larger, on the specimen, but they are all partial (or just hollow casts).

The third photo shows a zircon 1.9 mm in diameter. The crystal is a tetragonal bi-pyramid with a narrow prism belt.

This occurrence is from the Poudrette pegmatite , which had psedomorphs galore of all sorts. Based on the morphology, the most likely precursor is an eudilyte group mineral. But I have not seen any of these where relect eudialyte that could be analyzed is visible.

If you like pseudomorphs, this could be an interesting addition.

Single item shipping weight (no case) is 2.9 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

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

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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.