Ettringite on Matrix
Lot 1250
Ettringite on Matrix
Sold for US$ 2,440 inc. premium
Auction Details
Natural History Los Angeles
12 Dec 2010 10:00 PST

Auction 18406
Lot Details
Ettringite on Matrix
N'Chwaning Mines, Kuruman, Kalahari Manganese Fields, Northern Cape Province, South Africa
Named for Ettringen, Germany after the discovery of its type locality in 1874, ettringite is a sulfate which originally formed as a precipitate from hydrothermal solutions. This specimen is from a small find at this famous old South African mine. Usually specimens from this region are formed of free-standing crystals without matrix. However, this particular specimen is unique in that it features translucent yellow-green crystals, measuring up to ¾ of an inch, on a dramatic black matrix covered with drusy micro-crystals. The luster shimmers and the hue of the crystals has a touch of golden yellow.
Measures 2 3/8 x 2 x 1 in.

Footnotes

  • Provenance: Ex. Jim and Dawn Minette Mineral Collection
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