This is a genuine vintage mineral specimen featuring natural gold coating native copper with cuprite, from the Twin Buttes Mining District, Pima County, Arizona—one of the most historically significant copper and precious-metal localities in the American Southwest.
The specimen displays rich native copper with deep cuprite oxidation, accented by naturally deposited gold occurring as bright metallic flecks and micro-crystalline surface plating. This type of gold occurrence is the result of secondary mineralization, where gold precipitates directly onto existing copper surfaces over long geological periods.
Housed in its original acrylic display case with original period label, this piece comes from an older private collection and has not been cleaned, altered, or removed from its mount. The presentation and labeling are consistent with mid-to-late 20th-century mineral cabinet specimens assembled for serious collectors and educational collections.
Twin Buttes specimens are no longer actively produced, and examples showing visible natural gold association with copper and cuprite are increasingly difficult to find—especially with intact original labeling and display.
This piece is offered as part of a Privately Owned Vintage Gold Collection, valued for its locality accuracy, geological authenticity, and preserved vintage presentation.
Estimated total specimen weight (host + minerals): ~2.5 grams
(Gold content not extracted or tested to preserve originality)
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