{"id":10144,"date":"2025-12-19T20:59:16","date_gmt":"2025-12-19T19:59:16","guid":{"rendered":"https:\/\/www.maison-riondet.fr\/en\/?p=10144"},"modified":"2025-12-19T20:59:17","modified_gmt":"2025-12-19T19:59:17","slug":"unheated-deep-blue-sapphire-ring-of-3-87-carats-lab-certificate-and-old-cut-diamonds-1-60-carats-by-robert-algranate-early-20th-century","status":"publish","type":"post","link":"https:\/\/www.maison-riondet.fr\/en\/unheated-deep-blue-sapphire-ring-of-3-87-carats-lab-certificate-and-old-cut-diamonds-1-60-carats-by-robert-algranate-early-20th-century\/","title":{"rendered":"Unheated deep blue sapphire ring of 3.87 carats (lab certificate) and old-cut diamonds (1.60 carats) by Robert Algranate, early 20th century"},"content":{"rendered":"\n<p>Type of jewelry: Antique jewelry \/ Antique ring<br>Period: Early 20th century<br>Metal: 18k gold (750\/1000)<br>Origin: French work (French hallmark)<br>Maker&rsquo;s mark with the initials R.A. and two dots, corresponding to Robert Algranate<br>Total weight (gross): 6.30 grams<br>Ring size: 52 (resizing possible)<br>Dimensions (ring head): 1.8 cm x 1.3 cm<br>Nature of the stones: Unheated sapphire (approximately 3.87 carats, Bellerophon Gemlab Paris Place Vend\u00f4me laboratory certificate indicating the absence of heat treatment) and old-cut diamonds (approximately 1.60 carats)<br>Condition: Very good condition<br>Price: \u20ac4,900<br>Reference: 24 035 3<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Type of jewelry: Antique jewelry \/ Antique ringPeriod: Early 20th centuryMetal: 18k gold (750\/1000)Origin: French work (French hallmark)Maker&rsquo;s mark with the initials R.A. and two dots, corresponding to Robert AlgranateTotal weight (gross): 6.30&#8230;<\/p>\n","protected":false},"author":4,"featured_media":10145,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[9,14,3],"tags":[],"class_list":["post-10144","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-belle-epoque","category-catalogue","category-rings"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.maison-riondet.fr\/en\/wp-json\/wp\/v2\/posts\/10144","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.maison-riondet.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.maison-riondet.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.maison-riondet.fr\/en\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.maison-riondet.fr\/en\/wp-json\/wp\/v2\/comments?post=10144"}],"version-history":[{"count":1,"href":"https:\/\/www.maison-riondet.fr\/en\/wp-json\/wp\/v2\/posts\/10144\/revisions"}],"predecessor-version":[{"id":10146,"href":"https:\/\/www.maison-riondet.fr\/en\/wp-json\/wp\/v2\/posts\/10144\/revisions\/10146"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.maison-riondet.fr\/en\/wp-json\/wp\/v2\/media\/10145"}],"wp:attachment":[{"href":"https:\/\/www.maison-riondet.fr\/en\/wp-json\/wp\/v2\/media?parent=10144"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.maison-riondet.fr\/en\/wp-json\/wp\/v2\/categories?post=10144"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.maison-riondet.fr\/en\/wp-json\/wp\/v2\/tags?post=10144"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}