Masua Mine, Masua, Iglesias, Carbonia-Iglesias Province, Sardinia, Italy
    One of the classic and revered mineral localities is the Masua Mine of Sardinia. The bright yellow coloration of this classic Smithsonite is probably due to traces of Cadmium substituting for Zinc in the crystal structure. With the single exception of color, this polished slice of yellow stalactitic Smithsonite is almost a perfect match for the blue version in this auction (see Lot # 49030). Bright yellow, orange, and reddish-tan layers of varying hue and saturation surround the grey central core material, probably impure Quartz, which these concentric bands ended up overcoating. Undoubtedly a very old specimen due to the fact that there has been no production from the area in decades: it has been sawn into a thin slice and then polished on both sides to better expose the delicate and colorful banding concealed within. This lapidary treatment is quite typical for material from this area. In addition, it has been stabilized to guard against damage, but is not appreciably different in appearance from before. It measures 3½ x 3 x 3/16 inches (8.9 x 7.6 x .5 cm) and is in fine condition.

    Provenance: ex. Keith Proctor Collection
    ex. Scott Rudolph Collection
    ex. Terry Szenics Collection

    Estimate: $6,500 - $7,500.

    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. 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.

    Fees, Shipping, and Handling Description: Requires 3rd Party Shipping (view shipping information)

    Sales Tax information  |  Terms and Conditions

    Bidding Guidelines and Bid Increments

    Glossary of Terms

    Auction Info

    Auction Dates
    May, 2012
    20th Sunday
    Bids + Registered Phone Bidders: 0
    Lot Tracking Activity: N/A
    Page Views: 951

    Buyer's Premium per Lot:
    25% on the first $50,000 (minimum $14), plus 20% of any amount between $50,000 and $1,000,000, plus 12% of any amount over $1,000,000 per lot.

    Sold for: Sign-in or Join (free & quick)

    Heritage membership

    Join Now - It's Free

    1. Past Auction Values (prices, photos, full descriptions, etc.)
    2. Bid online
    3. Free Collector newsletter
    4. Want List with instant e-mail notifications
    5. Reduced auction commissions when you resell your
    Consign now
    • Cash Advances
    • More Bidders
    • Trusted Experts
    • Over 200,000 Satisfied Consignors Since 1976
    Consign to the 2018 June 22 American Indian Art - Dallas.

    Learn about consigning with us

    I sent out several inquiries, but Moyun is the primary reason I went with Heritage. She is extremely knowledgeable.
    Linda H.,
    Washington, D.C.
    View More Testimonials receives more traffic than any other auction house website. (Source:

    Video tutorial

    Getting the most out of search

    Recent auctions

    2017 October 13 Illustration Art Signature Auction - Dallas
    2017 October 13 Illustration Art Signature Auction - Dallas
    REALIZED $1,098,328