{"product_id":"polished-black-basalt-crystals-x-4-from-antsirabe-madagascar","title":"Polished Black Basalt Crystals x 4 From Antsirabe, Madagascar","description":"\u003cp\u003e\u003cstrong\u003eA NOTE FROM NICK\u003c\/strong\u003e\u003cbr\u003eA tray of 4 expertly polished Black Basalt crystals. Lapidary work with that nice pitch black mirror-polished finish.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePRODUCT DESCRIPTION\u003c\/strong\u003e\u003cbr\u003eBasalt is a fine-grained volcanic rock formed from fast-cooling lava, rich in Pyroxene and Plagioclase Feldspar. It is dense and black and takes a smooth shiny polish, and it holds heat well, which is why it is used for massage stones. It has a Mohs hardness of about 6.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePRODUCT DATA\u003c\/strong\u003e\u003cbr\u003eLocality = Antsirabe, Madagascar\u003cbr\u003eGrade = Very Good to A Grade\u003cbr\u003eSize = 140 - 184 mm\u003c\/p\u003e","brand":"BASALT","offers":[{"title":"Default Title","offer_id":50898545311937,"sku":"190-239-261105BM-180-622","price":1640.8,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2066\/6451\/files\/190239_3.jpg?v=1794408477","url":"https:\/\/www.toprocks.com\/products\/polished-black-basalt-crystals-x-4-from-antsirabe-madagascar","provider":"Toprock Gemstones and Minerals ","version":"1.0","type":"link"}