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Sturmanite with Calcite
Sturmanite with Calcite. Front
Front
Sturmanite with Calcite. Top
Top
 

MA77W7: Isolated crystals, some of them doubly terminated, comprised of the hexagonal prism, a much flattened dipyramid and the pinacoid. The crystals, implanted on a matrix coated by microcrystalline Calcite, are notable for their intense and bright yellow color. As usual when the identification is uncertain we will provide an analysis to the buyer of the specimen. In this case to prove that it is Sturmanite and not Ettringite.
The sample is with an autographed label from the Desmond Sacco collection that we'll send to the buyer.
N'Chwaning II Mine, N'Chwaning mining area, Kuruman, Kalahari manganese field (KMF), Northern Cape Province  South Africa (1987)

Specimen size: 3.6 × 3 × 2.6 cm = 1.42” × 1.18” × 1.02”

Main crystal size: 1.3 × 0.9 cm = 0.51” × 0.35”

With handwritten label from the Desmond Sacco Collection



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