{"product_id":"black-butter-obsidian-rough","title":"Black Butter Obsidian - Rough","description":"\u003cp\u003e\u003cb\u003eOrigin\u003c\/b\u003e: Glass Buttes, Oregon, U.S.A.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDescription\u003c\/strong\u003e: Black butter obsidian is a favorite among flintknappers because it isn't as brittle as some of the glassier ones. It is unique because it is opaque, rather than translucent. The surface has a satin finish when spalled.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cb\u003eChemical Composition\u003c\/b\u003e\u003cspan\u003e: Primarily silica (SiO2), with aluminum, iron, magnesium, calcium, sodium, and potassium in smaller amounts depending on the lava source.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cstrong\u003eGrade\u003c\/strong\u003e: Lapidary Grade\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cstrong\u003eAppearance\u003c\/strong\u003e: Opaque\u003cbr\u003e\u003c\/span\u003e\u003cstrong\u003eCracks:\u003c\/strong\u003e None\u003cstrong\u003e\u003cbr\u003eInclusions\u003c\/strong\u003e: None\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eApproximate Size of\u003c\/b\u003e\u003cb\u003e 1 pc\u003c\/b\u003e\u003cspan\u003e: 14cm x 7cm x 2cm\u003cbr\u003e\u003c\/span\u003e\u003cstrong\u003eApproximate Weight of 1 pc\u003c\/strong\u003e\u003cspan\u003e: 280g\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003ci\u003e\u003cspan\u003eRough is rough. We do our best to grade and describe pieces in the lot, but ultimately, they all differ.\u003c\/span\u003e\u003c\/i\u003e\u003c\/p\u003e","brand":"Oregon, U.S.A.","offers":[{"title":"Gram","offer_id":47555015311530,"sku":null,"price":0.08,"currency_code":"CAD","in_stock":false},{"title":"250 grams","offer_id":47555015344298,"sku":null,"price":20.0,"currency_code":"CAD","in_stock":false},{"title":"Kilogram","offer_id":47555015377066,"sku":null,"price":80.0,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0601\/7158\/3658\/files\/BlackButter-Rough-1.jpg?v=1761164617","url":"https:\/\/rubblerockandgem.com\/ru\/products\/black-butter-obsidian-rough","provider":"Rubble Rock And Gem","version":"1.0","type":"link"}