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 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.
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