{"product_id":"round-lab-grown-diamond-twisted-cathedral-engagement-rings","title":"Round Lab Grown Diamond Twisted Cathedral Engagement Ring","description":"\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eDetail\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eIn the photos\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eCustomizable\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCenter diamond\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePortuguese Cut Round Brilliant · 7.00 mm · approx. 1.50 ct\u003c\/td\u003e\n\u003ctd\u003e1 ct, 1.5 ct, 2 ct, 2.5 ct, 3 ct, 3.5 ct, 4 ct, 4.5 ct\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAccent diamonds\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal diamond weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 1.50 ct\u003c\/td\u003e\n\u003ctd\u003eVaries with center size\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStone type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLab Grown Diamond\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSetting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFour-Prong Open Basket with Twisted Cathedral Shoulders\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFinish · Occasion\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh Polish · Engagement, Anniversary, Bridal\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch5\u003eAt a glance\u003c\/h5\u003e\n\n\u003cp\u003eA Portuguese cut round lab grown diamond engagement ring from Signora Jewels.\u003c\/p\u003e\n\n\u003cp\u003eAn approximately 1.50 ct Portuguese cut round brilliant measuring 7.00 mm is secured in a four-prong open basket with twisted cathedral shoulders. IGI certified.\u003c\/p\u003e\n\n\u003cp\u003eMade to order in 11 metals: Silver, 9K\/14K\/18K Gold (Yellow, White and Rose) and Platinum.\u003c\/p\u003e\n\n\u003cp\u003eFree insured express shipping over $500, duties prepaid to the US, UK and Canada, 30-day returns.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eEach metal color is shown in the photos. Choose your preferred center diamond weight and metal from the options on this page.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe Portuguese cut displays an intricate arrangement of facets that creates exceptional depth and brilliance. At \u003cstrong\u003eSignora Jewels\u003c\/strong\u003e, the twisted cathedral shoulders rise gracefully toward the center before joining a four-prong open basket, giving the ring an elegant flowing profile while leaving the diamond completely visible.\u003c\/p\u003e\n\n\u003cp\u003eThe approximately 1.90 mm comfort-fit shank provides a refined balance beneath the 1.50 ct center stone, while the cathedral shoulders naturally draw the eye upward. The approximately 6.80 mm setting height allows light to reach the pavilion through the open gallery, enhancing the layered reflections unique to the Portuguese cut.\u003c\/p\u003e\n\n\u003cp\u003eBrowse our \u003ca href=\"\/collections\/engagement-rings\"\u003eengagement rings\u003c\/a\u003e, compare diamond shapes in the \u003ca href=\"\/pages\/diamond-stone-guide\"\u003ediamond stone guide\u003c\/a\u003e, or explore precious metal options in our \u003ca href=\"\/pages\/metal-guide\"\u003emetal guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDesign highlights\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003ePortuguese cut round center shown at approximately 1.50 ct\u003c\/li\u003e\n\u003cli\u003eCustomizable center diamond from 1 ct to 4.5 ct\u003c\/li\u003e\n\u003cli\u003eFour-prong open basket setting\u003c\/li\u003e\n\u003cli\u003eTwisted cathedral shoulders\u003c\/li\u003e\n\u003cli\u003eOpen gallery for enhanced light performance\u003c\/li\u003e\n\u003cli\u003eComfort-fit shank approximately 1.90 mm wide\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe sculpted shoulders create a gentle twist beneath the center instead of relying on accent diamonds for detail. This flowing profile complements the brilliant faceting of the Portuguese cut while keeping the overall design clean and timeless.\u003c\/p\u003e\n\n\u003ch5\u003eDiamond \u0026amp; Ring Details\u003c\/h5\u003e\n\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eDetails\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCenter stone\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePortuguese Cut Round Brilliant · 7.00 mm · approx. 1.50 ct (shown)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAccent stones\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal weight \/ count\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 1.50 ct · 1 Diamond\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSetting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFour-Prong Open Basket with Twisted Cathedral Shoulders\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCenter options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 ct, 1.5 ct, 2 ct, 2.5 ct, 3 ct, 3.5 ct, 4 ct and 4.5 ct\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFinish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHigh Polish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cem\u003eMeasurements are approximate. Your selected center diamond weight determines the final proportions of the finished ring.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch5\u003eAbout Lab Grown Diamonds\u003c\/h5\u003e\n\n\u003cp\u003eThe Portuguese cut features a high number of facets that create layered reflections and remarkable visual depth. Every center diamond is F color, VS1 clarity and IGI certified, selected to complement the elegant proportions of this cathedral solitaire.\u003c\/p\u003e\n\n\u003ch5\u003eMetal, Care \u0026amp; Fit\u003c\/h5\u003e\n\n\u003cp\u003eAvailable in Silver, 9K, 14K and 18K Yellow, White and Rose Gold, plus Platinum. Clean beneath the open basket and between the twisted shoulders using warm water, mild soap and a soft brush to maintain maximum brilliance and preserve the polished finish.\u003c\/p\u003e\n\n\u003ch5\u003eFAQ\u003c\/h5\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat makes a Portuguese cut unique?\u003c\/strong\u003e\u003cbr\u003e\nThe Portuguese cut features more facets than a traditional round brilliant, creating layered reflections and exceptional visual depth while maintaining a classic round outline.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the benefit of the twisted cathedral shoulders?\u003c\/strong\u003e\u003cbr\u003e\nThe twisted shoulders guide the eye naturally toward the center diamond while providing elegant support beneath the basket without adding extra width.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan this ring be worn with a wedding band?\u003c\/strong\u003e\u003cbr\u003e\nYes. The cathedral basket allows many straight wedding bands to sit close, while contoured bands can follow the raised profile more precisely.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhich metal color best complements this design?\u003c\/strong\u003e\u003cbr\u003e\nWhite gold and platinum maximize the crisp brilliance of the Portuguese cut, while yellow and rose gold create a warm contrast around the round center diamond.\u003c\/p\u003e","brand":"Signora Jewels","offers":[{"title":"Silver \/ 1 ct","offer_id":58566503104672,"sku":"SJ\/DR\/LGRG0645","price":357.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ 1.5 ct","offer_id":58566508642464,"sku":"SJ\/DR\/LGRG0645","price":537.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ 2 ct","offer_id":58566508675232,"sku":"SJ\/DR\/LGRG0645","price":742.0,"currency_code":"USD","in_stock":true},{"title":"Silver \/ 2.5 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