Description

    ANHYDRITE
    Naica Mine, Naica, Mun. de Saucillo, Chihuahua, Mexico

    That Naica has Selenite in the various caves in the mine is known to just about everybody who watches National Geographic. As Selenite (CaSO4 2H2O) from Naica goes, this is a small group. What makes it special is that it: a.) it isn't beaten up and b.) it has partially altered to Anhydrite, which is composed of the same Calcium, Sulfur and Oxygen: CaSO4, but no water. This is not a normal occurrence. Why it happened here is a bit complicated. However it happened, the transparent Selenite now has a bone white coating of Anhydrite. Individual crystals range up to 17 cm in length while the group is around 20 cm in height not counting the acrylic base it is rising from. It is in excellent condition.
    Overall measurements: 8 x 4 x 4 inches (20.3 x 10.2 x 10.2 cm). Offered at no reserve.

    Provenance: Williams Minerals [Hoppel Catalog # D1734]

    [Scale: 1 inch, with mark at 1 cm]


    Condition Report*:

    Condition report available upon request.

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    Auction Info

    Auction Dates
    June, 2013
    2nd Sunday
    Bids + Registered Phone Bidders: 3
    Lot Tracking Activity: N/A
    Page Views: 1,000

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