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    Description

    RARE GEMSTONE: CASSITERITE - 20.77 CT.
    Ximen, Yunnan Prov., China

    Although Cassiterite has a number of properties that would make it an exceptional gemstone, its penchant for incorporating Iron into its structure almost always results in material too dark to facet. This oval cushion style stone shows wonderful flashes of rainbow "fire" due a Refractive Index (1.990 - 2.105) and dispersion (0.071) that are very close to Diamond. As is normal for this gem material, there is some zoning that is most apparent when viewed table down. All in all, a very well cut rare gemstone with superior "fire".
    Overall measurements: 14.2 x 10.0 mm, 20.77 cts. Offered at no reserve.

    Provenance: Terra Gems [Hoppel Catalog # G2008]

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


    Condition Report*: Condition report available upon request.
    *Heritage Auctions strives to provide as much information as possible but encourages in-person inspection by bidders. Statements regarding the condition of objects are only for general guidance and should not be relied upon as complete statements of fact, and do not constitute a representation, warranty or assumption of liability by Heritage. Some condition issues may not be noted in the condition report but are apparent in the provided photos which are considered part of the condition report. Please note that we do not de-frame lots estimated at $1,000 or less and may not be able to provide additional details for lots valued under $500. All lots are sold "AS IS" under the Terms & Conditions of Auction.

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    Auction Info

    Auction Dates
    June, 2013
    2nd Sunday
    Bids + Registered Phone Bidders: 13
    Lot Tracking Activity: N/A
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