{"product_id":"bixbyite-mn-thomas-range-juab-county-utah-copy","title":"Columbite- Keystone Mining District, Pennington County, South Dakota, USA","description":"\u003cp\u003eColumbite\u003cbr\u003eKeystone Mining District, Pennington County, South Dakota, USA\u003cbr\u003eDimensions: 3.4 x 2.7 x 1.6 cm\u003c\/p\u003e\n\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003eA classic columbite specimen from the historic Keystone Mining District of the Black Hills, South Dakota. Thick black to brownish-black tabular columbite crystals are prominently exposed throughout a contrasting white pegmatite matrix. The crystals display characteristic longitudinal striations and a dark submetallic luster.\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe Keystone district is historically important for its complex rare-element pegmatites and was an important early American source of columbite-tantalite. USGS records document columbite-tantalite production from several Keystone pegmatites, including the Peerless and Hugo mines.\u003c\/p\u003e","brand":"The Crystalary","offers":[{"title":"Default Title","offer_id":48012606898307,"sku":"barrydwr3-2of2-260","price":45.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0390\/4634\/8931\/files\/IMG_6463.jpg?v=1787872718","url":"https:\/\/www.thecrystalary.com\/products\/bixbyite-mn-thomas-range-juab-county-utah-copy","provider":"The Crystalary","version":"1.0","type":"link"}