{"id":498887,"date":"2019-02-16T16:14:32","date_gmt":"2019-02-16T16:14:32","guid":{"rendered":"https:\/\/www.antiquejewellerycompany.com\/au\/shop\/silver-blue-john-marcasite-ring\/"},"modified":"2024-09-27T00:57:46","modified_gmt":"2024-09-26T23:57:46","slug":"silver-blue-john-marcasite-ring","status":"publish","type":"product","link":"https:\/\/www.antiquejewellerycompany.com\/au\/shop\/silver-blue-john-marcasite-ring\/","title":{"rendered":"Silver, Blue John &#038; Marcasite Ring"},"content":{"rendered":"<p>Blue John is a semi-precious mineral, a form of fluorite with bands of a purple-blue or yellowish colour. It is only found in Derbyshire, the most famous caves being the Blue John Cavern and Treak Cliff Cavern at Castleton. During the 19th century, it was mined for its ornamental value, and mining continues on a small scale today. This silver ring features a good piece of Blue John with purple veins. It is surrounded by marcasite (iron pyrites) The shoulders are split and set with graded marcasite.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Blue John is a semi-precious mineral, a form of fluorite with bands of a purple-blue or yellowish colour. It is only found in Derbyshire, the most famous caves being the Blue John Cavern and Treak Cliff Cavern at Castleton. During the 19th century, it was mined for its ornamental value, and mining continues on a [&hellip;]<\/p>\n","protected":false},"featured_media":1000000343013,"template":"","meta":{"_acf_changed":false},"product_cat":[5308],"product_tag":[],"class_list":{"1":"product","6":"product_cat-uncategorised","7":"type-vintage-dress-rings","8":"type-vintage-rings","9":"period-mid-century","10":"ollys-picks-all","11":"material-marcasite","12":"material-metals","13":"material-silver","14":"ring-styles-unusual","16":"first","17":"instock","18":"shipping-taxable","19":"purchasable","20":"product-type-simple"},"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.8 (Yoast SEO v23.8) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Silver, Blue John &amp; Marcasite Ring | AJC - AUS<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.antiquejewellerycompany.com\/au\/shop\/silver-blue-john-marcasite-ring\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Silver, Blue John &amp; Marcasite Ring\" \/>\n<meta property=\"og:description\" content=\"Blue John is a semi-precious mineral, a form of fluorite with bands of a purple-blue or yellowish colour. It is only found in Derbyshire, the most famous caves being the Blue John Cavern and Treak Cliff Cavern at Castleton. 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