亞利桑那州是個傳奇的地方,更是礦物世界的天堂,本身就生產許多種礦物,造就了世界寶石及礦物的交易中心土桑市,而其金礦也相當有名,開採歷史很長,但是肉眼能見的自然金標本在礦石市場並不常見,如下圖之標本自然金〈重40.8g〉,從幾個面均可以看到金子顆粒,因此可以知道自然金是分怖在整塊母岩中,但外貌不佳,US$5就標到。

無疑的這也是件特別的金礦標本,地質條件也很特殊,需要再花些時間研究。

An excellent miniature sized specimen of Native Gold from Copperopolis. This specimen features small blebs of Gold contrasted by a brown iron-stained matrix. Best appreciated under magnification, but a good specimen for this seldom seen locality. This specimen is from the same small prospect where the Namibite was found.

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