Very Rare Smithsonite display specimen from Sinaloa Mexico dimensions 132

Item Information

Dimensions (mm) 132 x 86 x 40mm
Weight (carats) 3700 carats
Colors
No Treatment

Very Rare Smithsonite display specimen from Sinaloa Mexico

dimensions 132  mm x 86 mm x 40 mm

weight 740 grams

Mexico has two outstanding Smithsonite localities which contain beautifully colored Smithsonite, including deep pink and electric green colors. These are the Refugio Mine, Choix, Sinaloa; and the San Antonio Mine, Santa Eulalia District, Chihuahua.

Very Rare Smithsonite display specimen from Sinaloa Mexico
dimensions 132  mm x 86 mm x 40 mm
weight 740 grams
Mexico has two outstanding Smithsonite localities which contain beautifully colored Smithsonite, including deep pink and electric green colors. These are the Refugio Mine, Choix, Sinaloa; and the San Antonio Mine, Santa Eulalia District, Chihuahua.
Smithsonite occurs in a wide variation of colors. Its typical globular habit and often vibrant colors make this a desirable mineral for collectors. Smithsonite is composed of zinc carbonate, but the zinc may be partially replaced with other elements. Those elements are responsible for the color variations. For example, copper  often causes green or bright blue colors, and cobalt causes a pink to purple color. Cadmium makes Smithsonite yellow, and iron gives it a brown to reddish-brown color.
 Smithsonite aggregates are sometimes lubricated with oils by dealers to enhance luster and appeal to collectors.

Smithsonite belongs to the calcite group of minerals, a group of related carbonates that are isomorphous with one another. They are similar in many physical properties, and may partially or fully replace one another, forming a solid solution series. All members of the calcite group crystallize in the trigonal system, have perfect rhombohedral cleavage, and exhibit strong double refraction in transparent rhombohedrons.  Smithsonite is named in honor of James Smithson, the founder of the Smithsonian Institution.

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Auction ID 680782
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Starts 14th Jul 2017 4:40pm PDT
Ends 21st Jul 2017 4:40pm PDT

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