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    Beryl-Scheelite deposit, Mt Xuebaoding, Pingwu Co., Mianyang Prefecture, Sichuan Province, China
    Although there are a number of minerals that contain Tin as an integral component; only Cassiterite: the mineral form of Tin Oxide, occurs in economic quantities. Since the period from approximately 3,300-1,200 BCE constitutes the "Bronze Age", it stands to reason that the process of mining and refining Tin; an essential component of Bronze, had to have started around the same time. As a result; it may safely be said that Cassiterite has been a very highly valued ingredient in the development of primitive as well as modern technology. Cassiterite normally is extracted from the heavy, black sands and gravels of certain river sediments, but there are a number of mines where the mineral occurs in high enough concentrations to be worthwhile to extract. Crystals of this indispensible mineral are typically: rare, small and usually damaged in mining. This Cassiterite specimen is not only an exception to that rule - it is so far above it that it constitutes a 'World Class' specimen when compared to any other mineral specimen. The single, twinned Cassiterite is extremely large at around 3 inches in length and it possesses the brilliant, almost metallic luster that fine Cassiterites are known for. The surface of the crystal is complex and mirror bright. This crystal is in pristine condition with no damage whatsoever. This black jewel is boldly perched upon a matrix of silvery, bladed Muscovite crystals that serve to contribute complexity and drama to the overall effect. Few, if any, Cassiterite specimens are the equal of this large and perfect example. Overall measurements are 5 1/4 x 3 3/4 x 3 inches and it has a custom labeled base.

    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. Heritage does not guarantee the condition of frames and shall not be liable for any damage/scratches to frames, glass/acrylic coverings, original boxes, display accessories, or art that has slipped in frames. All lots are sold "AS IS" under the Terms & Conditions of Auction.

    Auction Info

    Auction Dates
    May, 2009
    17th Sunday
    Bids + Registered Phone Bidders: 2
    Lot Tracking Activity: N/A
    Page Views: 4,564

    Buyer's Premium per Lot:
    19.5% of the successful bid (minimum $9) per lot.

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