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CC52286

BETPAKDALITE-CaMg

BETPAKDALITE-CaMg

Size:
34 x 59 x 38 mm
Weight:
135 g
£2,596.00 GBP
£2,596.00 GBP
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Detailed information

Species Betpakdalite-CaMg
Dimensions 34 x 59 x 38 mm
Weight 135 g
Locality Tsumeb Mine Tsumeb, Oshikoto Region Namibia
Condition Analysed
Betpakdalite-CaMg is one of the rarest secondary species known from the remarkable Tsumeb mine in Namibia. Forming vivid mustard yellow coatings and microcrystals, this complex heteropolymolybdate has recently been redefined through the splitting of Betpakdalite into five visually similar, but chemically distinct species. The original Betpakdalite species, named after the Betpakdala Desert in Kazakhstan that includes the Type Locality, is now reclassified as Betpakdalite-CaCa with a new species Betpakdalite-CaMg identified on specimens from Tsumeb mine in Namibia. This exceptionally rich, very large miniature Betpakdalite specimen from Tsumeb mine from the Kessler Collection has been analysed recently by SEM microprobe and is indeed Betpakdalite-CaMg. The Betpakdalite-CaMg forms two quite extensive areas (3 x 2.5 cm and 2.3 x 1.0 cm) of yellow-orange, scaly, microcrystalline coatings upon a dense unidentified dark grey to purple-grey sulphide-bearing matrix (perhaps Germanite or Renierite, and Tennantite/Chalcocite). This is world-class in terms of its overall coverage of this exotic phase and although some areas are quite thin, others form thicker crystallized coatings. Amongst the brightest yellow coatings there are no perfect individual crystals, but in the area between the two yellow coatings, there are two or three tiny glassy transparent sherry-coloured pointed crystals. Quite what these are is uncertain, but they are a secondary species of some sort.

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I bought a specimen but it is not what I expected or was damaged in transit. Can I return the specimen?

Inevitably, sometimes things don't go as expected. Whether the specimen is damaged in transit or the identity is incorrect, we are aware that this can result in the return of a specimen.If your specimen is damaged during shipping, it is vitally important to take a photo of the packaging and specimen in situ. By recording this, we get an idea of the nature and possible reason behind the damage and will be able to process the return much faster.If you discover that the mineral species has been misidentified, we require details of the method of identification in order to understand why you believe this to be the case. If the identity is in question but no formal analysis has been attempted, Crystal Classics will assess the situation on a case-by-case basis. In some instances, this may mean the specimen is sent for analysis to determine the identity.In any scenario where a specimen is analysed and the species in question is not present on the specimen, we will provide a full refund.If you feel that the specimen was misrepresented in any way, please ensure you make contact with us within the 30 day grace period for resolution.In all instances, please ensure that you call or e-mail us immediately, prior to the return of a specimen to Crystal Classics, so that we can advise regarding the returns procedure. Failure to contact us prior to the return of a specimen may lead to the rejection of your return.Shipping costs of all returns are to be covered by the customer, unless the specimen was damaged in transit or if the identity is incorrect.

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