Morro Redondo Mine, Coronel Murta, Jequitinhonha Valley, Minas Gerais, Brazil

    Feldspar minerals come in all flavors, colors and shapes. Sometimes, as here, you get two for one. In this case blocky, twinned Orthoclase crystals (KAlSi3O8) up to 3.5 inches (9.4 cm) across on Albite: (NaAlSi3O8).The "twofer" motif is continued with regard to the twinning exhibited by the Orthoclase. Not only does it show Manebach form of twinning, it also throws in for free, Baveno twinning as well. The color of the two types of Feldspar are virtually identical - a cream white tone. Form is the real distinguishing point - while the Orthoclase is blocky, the Albite features a parallel bladed style of crystallization. Condition is excellent with no observable damage.
    Overall measurements: 4.25 x 3.5 x 2.75 inches (10.8 x 8.9 x 7 cm).

    Provenance: Attards Minerals [Hoppel # D1496]

    Estimate: $500 - $650.

    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.

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    Auction Info

    Auction Dates
    October, 2013
    19th-20th Saturday-Sunday
    Bids + Registered Phone Bidders: 0
    Lot Tracking Activity: N/A
    Page Views: 471

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