{"product_id":"round-lab-created-blue-sapphire-cabochon-4-8mm","title":"Round Lab-Created Blue Sapphire Cabochon","description":"\u003cp\u003eThese round lab-created blue sapphire cabochons are composed of man-made corundum sharing the same chemical composition and durability as natural sapphire. Each stone displays excellent clarity with vivid, even coloration ranging from medium-dark to dark blue — ideal for setting in finished jewelry intended for everyday wear.\u003c\/p\u003e\u003cp\u003eSapphire is one of the most popular colored gemstones in the United States, prized for its extraordinary hardness and resilience. The blue color in sapphire is caused by trace elements of iron and titanium within the corundum crystal structure. Pure corundum is naturally colorless; the presence of trace elements produces the broad spectrum of sapphire colors available. These lab-created stones are treated as synthetic, offering consistent quality and color at an accessible price point for jewelers and metalsmiths.\u003c\/p\u003e\u003cp\u003eSapphire is the traditional birthstone for September, making these cabochons a popular choice for birthstone jewelry. Care is straightforward — clean with warm, soapy water. Use of an ultrasonic cleaner or steam cleaner is generally considered safe for these stones.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eLab-created corundum with the same chemical composition as natural sapphire\u003c\/li\u003e\n\u003cli\u003eVivid, even medium-dark to dark blue coloration\u003c\/li\u003e\n\u003cli\u003eEye-clean clarity\u003c\/li\u003e\n\u003cli\u003eOpaque cabochon cut — no faceting\u003c\/li\u003e\n\u003cli\u003eTreatment: Synthetic\u003c\/li\u003e\n\u003cli\u003eSeptember birthstone\u003c\/li\u003e\n\u003cli\u003eSuitable for everyday wear jewelry applications\u003c\/li\u003e\n\u003cli\u003eCompatible with ultrasonic and steam cleaning\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eStone Type\u003c\/th\u003e\n\u003ctd\u003eLab-Created Blue Sapphire (Synthetic Corundum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCut\u003c\/th\u003e\n\u003ctd\u003eRound Cabochon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eVivid Medium-Dark to Dark Blue\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eClarity\u003c\/th\u003e\n\u003ctd\u003eEye-Clean, Opaque\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTreatment\u003c\/th\u003e\n\u003ctd\u003eSynthetic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBirthstone Month\u003c\/th\u003e\n\u003ctd\u003eSeptember\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCare\u003c\/th\u003e\n\u003ctd\u003eWarm soapy water; ultrasonic and steam cleaning generally safe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eAvailable Options\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePart #\u003c\/th\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e931-904\u003c\/td\u003e\n\u003ctd\u003e4mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e931-905\u003c\/td\u003e\n\u003ctd\u003e5mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e931-906\u003c\/td\u003e\n\u003ctd\u003e6mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e931-908\u003c\/td\u003e\n\u003ctd\u003e8mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Otto Frei","offers":[{"title":"4mm","offer_id":47551798444246,"sku":"931-904","price":7.6,"currency_code":"USD","in_stock":true},{"title":"5mm","offer_id":47551798477014,"sku":"931-905","price":8.7,"currency_code":"USD","in_stock":true},{"title":"6mm","offer_id":47551798509782,"sku":"931-906","price":14.0,"currency_code":"USD","in_stock":true},{"title":"8mm","offer_id":47551798542550,"sku":"931-908","price":17.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/round-lab-created-blue-sapphire-cabochon-otto-frei.jpg?v=1719954612","url":"https:\/\/www.ottofrei.com\/products\/round-lab-created-blue-sapphire-cabochon-4-8mm","provider":"Otto Frei","version":"1.0","type":"link"}