This is a micro. You will need 15-30X to view it properly. However, it is an ANALYZED (WDS) specimen and it has actual well formed crystals of manganoeudialyte rather than just cleavages. I do not think you will see such material offered very often. In fact, even nepheline, which is of course very common at MSH, is not often available as well formed crystals from here.

The first two photos show manganoeudialyte crystals to about 0.6-0.7 mm on edge. All of the crystals are more or less pale pink, but some appear to be very dark in the photos due to lighting. The same crystals are visible at bottom right in the broader view of the third photo, from which it is clear that the these xls are pink as well. The light colored and gray xls are nepheline. The largest nepheline crystal in the third photo is 2.5 mm in diameter. The very dark, short prismatic, xls are “arvedsonite” – probably arfvedsonite proper, but not analyzed. Other fragments of this specimen also have violet cancrisilite prisms and a bit of villiaumite, but neither of those occurs on this fragment.

While the specimen is small, there are some other well formed xls of each of the species (not shown in the photos).

Note:This particular fragment was analyzed at CMN and was given the tentative name ‘manganoeudialyte’ several years before the description of manganoeudialyte from Poços de Caldas. However, none of the material found at MSH was suitable for structure determination, and thus could not be submitted for IMA approval. This specimen was analyzed via WDS and there is no doubt that it is manganoeudialyte – despite the lack of structural analysis. The ID card is pictured in the last photo. But please note that you will only get a copy. I am keeping the original to go with the other three fragments of this specimen.

Weight (including MM box) 0.1 oz. Single item shipping weight 2.1 oz. Up to 4 oz, this can be combined with other items for the same postage. Alternatively, outside the USA, this can be shipped in a padded envelope for $7.