{"product_id":"native-copper-40-00","title":"Native Copper $40.00","description":"\u003cp data-start=\"139\" data-end=\"511\"\u003eNative copper is one of the few metals that occurs in pure, metallic form in nature. Composed entirely of elemental copper (Cu), it typically forms in the oxidized zones of copper deposits and volcanic basalt flows. These unrefined specimens display copper’s natural reddish metallic luster and distinctive branching or nugget-like shapes. Each piece is unique!\u003c\/p\u003e\n\u003cp data-start=\"513\" data-end=\"526\"\u003eFeatures:\u003c\/p\u003e\n\u003cul data-start=\"528\" data-end=\"1428\"\u003e\n\u003cli data-start=\"528\" data-end=\"665\"\u003e\n\u003cp data-start=\"530\" data-end=\"665\"\u003eComposition: Pure elemental copper (Cu), often found with minor inclusions of other minerals such as calcite, quartz, or malachite.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"667\" data-end=\"857\"\u003e\n\u003cp data-start=\"669\" data-end=\"857\"\u003eFormation: Forms through hydrothermal processes or as a secondary mineral in the oxidized portions of copper sulfide deposits. In some cases, it crystallizes directly from molten lava.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"859\" data-end=\"1045\"\u003e\n\u003cp data-start=\"861\" data-end=\"1045\"\u003eAppearance: Characterized by its reddish-brown metallic color, high density, and potential to develop a greenish surface patina (copper carbonate) when exposed to air and moisture.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1047\" data-end=\"1269\"\u003e\n\u003cp data-start=\"1049\" data-end=\"1269\"\u003eGeologic Sources: Significant deposits are found in Michigan’s Keweenaw Peninsula, Arizona, and parts of South America. These regions are known for some of the largest and most well-preserved native copper specimens.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1271\" data-end=\"1428\"\u003e\n\u003cp data-start=\"1273\" data-end=\"1428\"\u003eEducational Value: Ideal for studying native elements, early metal use in human history, and geologic environments that support native metal formation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1430\" data-end=\"1592\"\u003eThese specimens provide a direct look at one of Earth’s naturally occurring metals and is perfect for geology collections, classrooms, or natural history displays.\u003c\/p\u003e","brand":"The Science Museum of Minnesota","offers":[{"title":"Default Title","offer_id":47750013223126,"sku":"R4000","price":40.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0641\/2491\/1830\/files\/IMG-8697_1.jpg?v=1769021894","url":"https:\/\/threecrows.com.co\/products\/native-copper-40-00","provider":"ThreeCrowsLLP","version":"1.0","type":"link"}