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    Description

    Boulder Opal in Integrated Base
    Quilpie, Quilpie Shire, Queensland, Australia



    Not surprisingly, Opal is the national gemstone of Australia. The island continent is certainly well known for producing the October birthstone, to the tune of accounting for as much as 95 to 97% of the world's supply of the precious stone. An amorphous form of silica, Opal is so highly prized for its vibrant colors and the brilliance with which the colors "fire" when exposed to light. Australian Boulder Opals are one of the more valuable varieties and easily distinguished by the layer of solid brown ironstone on the back of the rock. In this case, veins of colorful Opal form in cracks and fissures of large ironstone boulders underground, which are then mined. Australian Boulder Opals are only found in Queensland in the Opal fields of Quilpie and Winton. This impressive specimen is rather large and has been incorporated into a rustic, custom metal base. The face exhibits large areas of exposed Opal which are smooth to the touch and have a myriad of colors including white, gold, blue and purple. The "neon" veins within the piece glow when lit properly. The surface of the Opal measures almost 7 inches (17.78 cm) at its fullest dimension. This is a highly decorative and rather interesting example of popular Boulder Opal.
    Overall Measurements: 6.8 x 5.1 x 8.3 inches (17.1 x 13.0 x 21.0 cm)
    Offered at no reserve.


    Estimate: $4,000 - $6,000.

    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
    October, 2015
    4th Sunday
    Bids + Registered Phone Bidders: 0
    Lot Tracking Activity: N/A
    Page Views: 454

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