{"product_id":"copper-replacement-agate-a-rare-piece-of-michigans-copper-country-copy","title":"Rare Hematite Tube Copper Replacement Agate","description":"\u003ch3 data-start=\"144\" data-end=\"191\"\u003eRare Hematite Tube Copper Replacement Agate\u003c\/h3\u003e\n\u003cp data-start=\"192\" data-end=\"224\"\u003e\u003cstrong data-start=\"192\" data-end=\"224\"\u003eKeweenaw Peninsula, Michigan\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"226\" data-end=\"364\"\u003eAn exceptionally uncommon Copper Replacement Agate containing preserved hematite tube structures and visible native copper mineralization.\u003c\/p\u003e\n\u003cp data-start=\"366\" data-end=\"802\"\u003eThe dark tube-like formations within this specimen are composed of hematite, while native copper occurs around portions of the tubes and can be observed within the agate itself, including a small but distinct area of copper banding. The combination of hematite tubes, copper replacement, and agate occurring together in a single specimen represents an unusual sequence of geological events rarely encountered in Copper Country material.\u003c\/p\u003e\n\u003cp data-start=\"804\" data-end=\"977\"\u003eTo date, only two examples of this formation type are known from the Keweenaw Peninsula, making this a significant collector specimen rather than a typical decorative agate.\u003c\/p\u003e\n\u003cp data-start=\"979\" data-end=\"1301\"\u003eThe cut surfaces reveal both cross-sectional and longitudinal views of the hematite tubes, providing a unique look into the stone's internal structure. Areas of native copper and oxidation create a natural contrast against the translucent chalcedony, highlighting the complex mineral history preserved within the specimen.\u003c\/p\u003e\n\u003cp data-start=\"1303\" data-end=\"1525\"\u003eThis piece may not be defined by bright colors or classic fortification patterns. Its significance lies in its rarity and geological uniqueness—a specimen that records multiple mineralizing processes within a single stone.\u003c\/p\u003e\n\u003cp data-start=\"1527\" data-end=\"1540\"\u003e\u003cstrong data-start=\"1527\" data-end=\"1540\"\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1541\" data-end=\"1772\"\u003e\n\u003cli data-start=\"1541\" data-end=\"1577\"\u003ePreserved hematite tube structures\u003c\/li\u003e\n\u003cli data-start=\"1578\" data-end=\"1627\"\u003eNative copper surrounding portions of the tubes\u003c\/li\u003e\n\u003cli data-start=\"1628\" data-end=\"1669\"\u003eVisible copper banding within the agate\u003c\/li\u003e\n\u003cli data-start=\"1670\" data-end=\"1716\"\u003eCollected from Michigan's Keweenaw Peninsula\u003c\/li\u003e\n\u003cli data-start=\"1717\" data-end=\"1772\"\u003eOne of only two known examples of this formation type\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1774\" data-end=\"1943\"\u003eA remarkable addition for advanced agate collectors, Copper Country enthusiasts, and mineral collectors seeking material that is seldom seen and rarely offered for sale.\u003c\/p\u003e\n\u003cp data-start=\"1774\" data-end=\"1943\"\u003e\u003cspan\u003eSome specimens are purchased for their beauty. Others are purchased because another opportunity may never come along. This is one of those stones.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"1774\" data-end=\"1943\"\u003e \u003c\/p\u003e","brand":"Wild Superior Gems","offers":[{"title":"Default Title","offer_id":42926916501575,"sku":null,"price":500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0266\/3140\/5639\/files\/0471D0B6-7D49-41BE-8A29-E1B344CB7873.jpg?v=1783093580","url":"https:\/\/wildsuperiorgems.com\/products\/copper-replacement-agate-a-rare-piece-of-michigans-copper-country-copy","provider":"Wild Superior Gems","version":"1.0","type":"link"}