{"product_id":"native-copper-nuggets-mineral-tumbled-michigan-usa","title":"Native Copper Nuggets - Mineral\/Tumbled","description":"\u003cp\u003e\u003cstrong\u003eLocality:\u003c\/strong\u003e Michigan, U.S.A.\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eDescription\u003c\/strong\u003e: These specimens are naturally occurring nuggets of copper metal found in Michigan's upper peninsula. \u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003eThe story of their formation begins during\u003c\/span\u003e the Precambrian era, around 1.1 billion years ago, the region that is now Michigan experienced volcanic activity and the formation of large magma chambers beneath the Earth's surface. These magma chambers contained significant amounts of copper and other metals. As the magma cooled and solidified, copper minerals formed within the rock. Over time, geological forces such as erosion and weathering exposed these copper-rich rocks at the surface. Subsequent glaciation events further eroded the rock, releasing native copper into the environment. The native copper nuggets found in Michigan were likely transported and deposited by glaciers during the last Ice Age, which ended around 10,000 years ago. Glacial movement scraped and carried the copper nuggets along with other sedimentary material, eventually depositing them in various locations across the landscape.\u003c\/p\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eThese specimens are lightly tumbled to display their natural copper coloration and beautiful metallic luster, which is generally hidden by surface weathering.\u003c\/span\u003e\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eChemical Composition\u003c\/strong\u003e: Cu\u003c\/p\u003e\n\n\u003cp data-mce-fragment=\"1\" class=\"p1\"\u003e\u003cem\u003e*Note: the shapes of these specimens are highly variable - some are flattened or stretched out, while others are solid dense spheroid nuggets. As a result, the size estimations provided are only rough approximations. Weights will still be within the provided ranges, but the specimens may vary in length or width depending on overall shape.\u003c\/em\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" class=\"p1\"\u003e\u003cb data-mce-fragment=\"1\"\u003eMini\u003cbr\u003eApproximate Size of 1 Piece\u003c\/b\u003e:\u003cb data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cb data-mce-fragment=\"1\"\u003eApproximate Weight of 1 Piece\u003c\/b\u003e: \u0026gt;15g\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" class=\"p1\"\u003e\u003cb data-mce-fragment=\"1\"\u003eSmall\u003cbr\u003eApproximate Size of 1 Piece\u003c\/b\u003e: 1.8cm x 1.5cm x .5cm\u003cb data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cb data-mce-fragment=\"1\"\u003eApproximate Weight of 1 Piece\u003c\/b\u003e: 15-31g\u003cbr\u003e\u003cbr\u003e\u003cb data-mce-fragment=\"1\"\u003eMedium\u003cbr data-mce-fragment=\"1\"\u003eApproximate Size of 1 Piece\u003c\/b\u003e: 3cm x 2cm x 1cm\u003cb data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cb data-mce-fragment=\"1\"\u003eApproximate Weight of 1 Piece\u003c\/b\u003e: 31-55g\u003cbr\u003e\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" class=\"p1\"\u003e\u003cb data-mce-fragment=\"1\"\u003eLarge\u003cbr\u003eApproximate Size of 1 Piece\u003c\/b\u003e: 4.5cm x 2.5cm x 1.2cm\u003cb data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cb data-mce-fragment=\"1\"\u003eApproximate Weight of 1 Piece\u003c\/b\u003e: 56-76g\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" class=\"p1\"\u003e\u003cb data-mce-fragment=\"1\"\u003eX-Large\u003cbr\u003eApproximate Size of 1 Piece\u003c\/b\u003e: 5cm x 3cm x 2cm\u003cb data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cb data-mce-fragment=\"1\"\u003eApproximate Weight of 1 Piece\u003c\/b\u003e: 77-100g\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" class=\"p1\"\u003e\u003cb data-mce-fragment=\"1\"\u003eXX-Large\u003cbr\u003eApproximate Size of 1 Piece\u003c\/b\u003e: 6.5cm x 3.5cm x 2.5cm\u003cb data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cb data-mce-fragment=\"1\"\u003eApproximate Weight of 1 Piece\u003c\/b\u003e: 101-130g\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" class=\"p1\"\u003e\u003cb data-mce-fragment=\"1\"\u003eXXX-Large\u003cbr\u003eApproximate Size of 1 Piece\u003c\/b\u003e: 7cm x 4.5cm x 2.5cm\u003cb data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cb data-mce-fragment=\"1\"\u003eApproximate Weight of 1 Piece\u003c\/b\u003e: 131-150g\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" class=\"p1\"\u003e\u003cb data-mce-fragment=\"1\"\u003eXXXX-Large\u003cbr\u003eApproximate Size of 1 Piece\u003c\/b\u003e: 8cm x 5cm x 3cm\u003cb data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cb data-mce-fragment=\"1\"\u003eApproximate Weight of 1 Piece\u003c\/b\u003e: 151-175g\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" class=\"p1\"\u003e\u003cb data-mce-fragment=\"1\"\u003e5X-Large\u003cbr\u003eApproximate Size of 1 Piece\u003c\/b\u003e: 9cm x 5cm x 3cm \u003cb data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cb data-mce-fragment=\"1\"\u003eApproximate Weight of 1 Piece\u003c\/b\u003e: 176-200g\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" class=\"p1\"\u003e\u003cb data-mce-fragment=\"1\"\u003e6X-Large\u003cbr\u003eApproximate Size of 1 Piece\u003c\/b\u003e: 10.5cm x 5cm x 3cm\u003cb data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cb data-mce-fragment=\"1\"\u003eApproximate Weight of 1 Piece\u003c\/b\u003e: 200-250g\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" class=\"p1\"\u003e\u003cb data-mce-fragment=\"1\"\u003e7X-Large\u003cbr\u003eApproximate Size of 1 Piece\u003c\/b\u003e: 11cm x 5.5cm x 3.5cm\u003cb data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cb data-mce-fragment=\"1\"\u003eApproximate Weight of 1 Piece\u003c\/b\u003e: 250g-300g\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" class=\"p1\"\u003e\u003cb data-mce-fragment=\"1\"\u003e8X-Large\u003cbr\u003eApproximate Size of 1 Piece\u003c\/b\u003e: 11.5cm x 6cm x 4cm\u003cb data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cb data-mce-fragment=\"1\"\u003eApproximate Weight of 1 Piece\u003c\/b\u003e: 300g-350g\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" class=\"p1\"\u003e\u003cb data-mce-fragment=\"1\"\u003e9X-Large\u003cbr\u003eApproximate Size of 1 Piece\u003c\/b\u003e: 12cm x 6cm x 4.5cm\u003cb data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cb data-mce-fragment=\"1\"\u003eApproximate Weight of 1 Piece\u003c\/b\u003e: 390g-475g\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" class=\"p1\"\u003e\u003cb data-mce-fragment=\"1\"\u003e10X-Large\u003cbr\u003eApproximate Size of 1 Piece\u003c\/b\u003e: 12.5cm x 6.5cm x 5cm\u003cb data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cb data-mce-fragment=\"1\"\u003eApproximate Weight of 1 Piece\u003c\/b\u003e: 500g-550g\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" class=\"p1\"\u003e\u003cb data-mce-fragment=\"1\"\u003e11X-Large\u003cbr\u003eApproximate Size of 1 Piece\u003c\/b\u003e: 12.5cm x 6.5cm x 5cm\u003cb data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cb data-mce-fragment=\"1\"\u003eApproximate Weight of 1 Piece\u003c\/b\u003e: 575g-675g\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" class=\"p1\"\u003e\u003cb data-mce-fragment=\"1\"\u003e12X-Large\u003cbr\u003eApproximate Size of 1 Piece\u003c\/b\u003e: 13cm x 7cm x 5cm\u003cb data-mce-fragment=\"1\"\u003e\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/b\u003e\u003cb data-mce-fragment=\"1\"\u003eApproximate Weight of 1 Piece\u003c\/b\u003e: 700g-750g\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" class=\"p1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eQuantity\u003c\/strong\u003e:\u003cstrong data-mce-fragment=\"1\"\u003e \u003c\/strong\u003e1pc\u003c\/p\u003e\n\u003cp data-mce-fragment=\"1\" class=\"p1\"\u003e\u003cem\u003eWe do our best to buy quality products- although not every rock is the same. If you choose to purchase the \"staff pick option\", we will select the best of the batch for you. Otherwise, it will be at random from the larger batch we have in stock.\u003c\/em\u003e\u003c\/p\u003e","brand":"Michigan, U.S.A.","offers":[{"title":"Mini \/ Standard","offer_id":46020861460650,"sku":null,"price":5.0,"currency_code":"CAD","in_stock":false},{"title":"Mini \/ Staff Pick","offer_id":46020861493418,"sku":null,"price":7.5,"currency_code":"CAD","in_stock":false},{"title":"Small \/ Standard","offer_id":46021172199594,"sku":"","price":10.0,"currency_code":"CAD","in_stock":false},{"title":"Small \/ Staff Pick","offer_id":46021172232362,"sku":"","price":15.0,"currency_code":"CAD","in_stock":false},{"title":"Medium \/ Standard","offer_id":46021172265130,"sku":"","price":20.0,"currency_code":"CAD","in_stock":true},{"title":"Medium \/ Staff Pick","offer_id":46021172330666,"sku":"","price":25.0,"currency_code":"CAD","in_stock":true},{"title":"Large \/ Standard","offer_id":46021172363434,"sku":"","price":30.0,"currency_code":"CAD","in_stock":true},{"title":"Large \/ Staff Pick","offer_id":46021172396202,"sku":"","price":40.0,"currency_code":"CAD","in_stock":true},{"title":"X-Large \/ Standard","offer_id":46021172428970,"sku":"","price":45.0,"currency_code":"CAD","in_stock":true},{"title":"X-Large \/ Staff Pick","offer_id":46021172494506,"sku":"","price":50.0,"currency_code":"CAD","in_stock":true},{"title":"XX-Large \/ Standard","offer_id":46021172527274,"sku":"","price":55.0,"currency_code":"CAD","in_stock":true},{"title":"XX-Large \/ Staff Pick","offer_id":46021172592810,"sku":"","price":60.0,"currency_code":"CAD","in_stock":true},{"title":"XXX-Large \/ Standard","offer_id":46021172625578,"sku":"","price":65.0,"currency_code":"CAD","in_stock":true},{"title":"XXX-Large \/ Staff Pick","offer_id":46021172658346,"sku":"","price":70.0,"currency_code":"CAD","in_stock":true},{"title":"XXXX-Large \/ Standard","offer_id":46021172691114,"sku":"","price":80.0,"currency_code":"CAD","in_stock":true},{"title":"XXXX-Large \/ Staff Pick","offer_id":46021172756650,"sku":"","price":90.0,"currency_code":"CAD","in_stock":true},{"title":"5X-Large \/ Standard","offer_id":46021172789418,"sku":"","price":100.0,"currency_code":"CAD","in_stock":true},{"title":"5X-Large \/ Staff Pick","offer_id":46021172854954,"sku":"","price":110.0,"currency_code":"CAD","in_stock":true},{"title":"6X-Large \/ Standard","offer_id":46021172887722,"sku":"","price":130.0,"currency_code":"CAD","in_stock":true},{"title":"6X-Large \/ Staff Pick","offer_id":46021172920490,"sku":"","price":140.0,"currency_code":"CAD","in_stock":true},{"title":"7X-Large \/ Standard","offer_id":46161554440362,"sku":"","price":145.0,"currency_code":"CAD","in_stock":true},{"title":"7X-Large \/ Staff Pick","offer_id":46161554473130,"sku":"","price":155.0,"currency_code":"CAD","in_stock":true},{"title":"8X-Large \/ Standard","offer_id":46161554505898,"sku":"","price":180.0,"currency_code":"CAD","in_stock":true},{"title":"8X-Large \/ Staff Pick","offer_id":46161554538666,"sku":"","price":190.0,"currency_code":"CAD","in_stock":true},{"title":"9X-Large \/ Standard","offer_id":46161554571434,"sku":"","price":210.0,"currency_code":"CAD","in_stock":true},{"title":"9X-Large \/ Staff Pick","offer_id":46161554604202,"sku":"","price":220.0,"currency_code":"CAD","in_stock":true},{"title":"10X-Large \/ Standard","offer_id":46161554669738,"sku":"","price":240.0,"currency_code":"CAD","in_stock":true},{"title":"10X-Large \/ Staff Pick","offer_id":46161554702506,"sku":"","price":250.0,"currency_code":"CAD","in_stock":true},{"title":"11X-Large \/ Standard","offer_id":46161554735274,"sku":"","price":280.0,"currency_code":"CAD","in_stock":true},{"title":"11X-Large \/ Staff Pick","offer_id":46161554768042,"sku":"","price":300.0,"currency_code":"CAD","in_stock":true},{"title":"12X-Large \/ Standard","offer_id":46161554800810,"sku":"","price":320.0,"currency_code":"CAD","in_stock":true},{"title":"12X-Large \/ Staff Pick","offer_id":46161554866346,"sku":"","price":330.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0601\/7158\/3658\/files\/Native-Copper-Nuggets-Tumbled-Specimen-3.jpg?v=1718145756","url":"https:\/\/rubblerockandgem.com\/ru\/products\/native-copper-nuggets-mineral-tumbled-michigan-usa","provider":"Rubble Rock And Gem","version":"1.0","type":"link"}