{"product_id":"circa-1930-art-deco-platinum-diamond-sapphire-ring","title":"Circa 1930 Art Deco Platinum Old European Cut Diamond \u0026 Sapphire Ring","description":"\u003cp\u003eBoldly geometric yet beautifully refined, this authentic \u003ca href=\"https:\/\/theteracollection.com\/blogs\/journal\/how-to-identify-authentic-art-deco-jewelry\"\u003eArt Deco\u003c\/a\u003e platinum diamond and sapphire ring dates to approximately 1930 and captures the graphic sophistication that defined the period. Two lively old-cut diamonds anchor the composition, separated by a slender deep-blue sapphire and framed at either end by sharply pointed triangular sapphires. The contrast between bright diamonds, saturated blue sapphires, and cool platinum gives this compact ring remarkable presence on the hand.\u003c\/p\u003e\n\u003cp\u003eWhat makes the ring particularly compelling is how much design is concentrated into such a beautifully proportioned form. The alternating diamonds and sapphires create a strong geometric rhythm across the finger, while fine milgrain, engraved shoulders, and an intricate pierced gallery soften the architecture with the delicate craftsmanship expected of fine period platinum jewelry.\u003c\/p\u003e\n\u003cp\u003eThe diamonds are beautifully matched in color, brightness, and lively sparkle, while their hand-cut facet patterns retain the individuality that makes antique diamonds so appealing. Combined with the rich blue sapphires and beautifully detailed platinum setting, they create a ring that feels distinctly Art Deco from every angle—architectural and precise, yet delicate and remarkably wearable nearly a century after it was made.\u003c\/p\u003e\n\u003ch2\u003eAt A Glance\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eAuthentic Circa 1930 Art Deco Ring\u003c\/li\u003e\n\u003cli\u003eSolid Platinum Period Construction\u003c\/li\u003e\n\u003cli\u003eTwo Well-Matched Natural \u003ca href=\"https:\/\/theteracollection.com\/blogs\/journal\/old-cut-diamonds-guide\" rel=\"noopener\" target=\"_blank\"\u003eOld-Cut Diamonds\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eRich Blue Geometric Sapphire Accents\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eFine Milgrain and Engraved Detailing\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eBeautifully Proportioned Geometric Design\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMetal:\u003c\/strong\u003e \u003ca href=\"https:\/\/theteracollection.com\/blogs\/journal\/platinum-vs-white-gold-antique-jewelry\"\u003eSolid Platinum\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHallmark:\u003c\/strong\u003e Stamped “PLAT”\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEra:\u003c\/strong\u003e Art Deco, Circa 1930\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiamond One:\u003c\/strong\u003e Natural Old European Cut Diamond measuring approximately 3.25 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiamond Two:\u003c\/strong\u003e Natural Old European \/ Transitional Cut Diamond measuring approximately 3.25 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEstimated Total Diamond Weight:\u003c\/strong\u003e Approximately 0.24–0.28 carat\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiamond Appearance:\u003c\/strong\u003e Well matched in apparent color, brightness, size, and face-up performance; lively with a slightly warm appearance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCenter Sapphire:\u003c\/strong\u003e Blue step-cut sapphire measuring approximately 1.75 × 3.66 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSide Sapphires:\u003c\/strong\u003e Two triangular-cut blue sapphires, each measuring approximately 2.96 mm along the flat side × 1.8 mm from the flat side to the point\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSapphire Color:\u003c\/strong\u003e Dark blue\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTotal Stone Count:\u003c\/strong\u003e Five — two natural diamonds and three blue sapphires\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRing Head:\u003c\/strong\u003e Approximately 12 mm long × 4.67 mm wide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight Above Finger:\u003c\/strong\u003e Approximately 4.5 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRing Weight:\u003c\/strong\u003e 2.81\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRing Size:\u003c\/strong\u003e 6.5\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eThe Diamonds\u003c\/h2\u003e\n\u003cp\u003eThe ring is set with two natural old-cut diamonds measuring approximately 3.25 mm each and estimated at approximately 0.24–0.28 carat combined. They are beautifully matched in apparent color, size, brightness, and face-up performance, with a touch of warmth and lively sparkle that contrasts particularly well against the darker blue sapphires.\u003c\/p\u003e\n\u003cp\u003eUnder high magnification, subtle differences in their hand-cut facet patterns become visible. One displays a pronounced open culet and the broad, flower-like pattern characteristic of an \u003ca href=\"https:\/\/theteracollection.com\/blogs\/journal\/old-european-cut-diamonds-explained\"\u003eOld European Cut diamond\u003c\/a\u003e, while the second has a considerably smaller culet and tighter central facet structure, suggesting a later Old European Cut approaching the \u003ca href=\"https:\/\/theteracollection.com\/blogs\/journal\/transitional-cut-diamonds-guide\"\u003eTransitional Cut\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eSuch variation is characteristic of antique hand-cut diamonds. Despite these subtle technical differences, the stones were clearly well matched visually and perform beautifully together in the ring.\u003c\/p\u003e\n\u003ch2\u003eThe Sapphires\u003c\/h2\u003e\n\u003cp\u003eThree dark blue sapphires provide the strong color contrast central to the design. A narrow step-cut sapphire separates the two diamonds, while pointed triangular-cut sapphires terminate the composition at either end.\u003c\/p\u003e\n\u003cp\u003eThe sapphires have a rich, darker blue appearance that creates dramatic contrast against the bright diamonds and cool platinum. Their geometric shapes are integral to the ring's architecture rather than simply decorative accent stones.\u003c\/p\u003e\n\u003cp\u003eThe sapphires have not been submitted to a gemological laboratory, and their natural versus synthetic origin is currently undetermined.\u003c\/p\u003e\n\u003ch2\u003eThe Design\u003c\/h2\u003e\n\u003cp\u003eThe architecture of this ring is quintessentially Art Deco.\u003c\/p\u003e\n\u003cp\u003eTwo geometric platinum diamond settings dominate the composition, divided at the center by a narrow rectangular sapphire. At either end, pointed triangular sapphires extend the design outward, creating a crisp progression of alternating white and blue stones across the finger.\u003c\/p\u003e\n\u003cp\u003eFine milgrain outlines the principal elements, while engraved detailing continues through the shoulders and creates a graceful transition into the platinum shank. The profile reveals another layer of craftsmanship: beneath the stones is an intricate pierced platinum gallery that gives the setting visual lightness while demonstrating the attention paid even to areas primarily seen from an angle.\u003c\/p\u003e\n\u003cp\u003eAt approximately 12 mm long by 4.67 mm wide, the head is compact but visually substantial. It rises approximately 4.5 mm above the finger, maintaining a relatively low and wearable profile while the alternating diamonds and dark sapphires provide excellent finger presence.\u003c\/p\u003e\n\u003cp\u003eThe combination of old-cut diamonds, geometric sapphire accents, fine milgrain, engraving, and pierced platinum construction creates a wonderfully complete expression of Art Deco design.\u003c\/p\u003e\n\u003ch2\u003eCondition\u003c\/h2\u003e\n\u003cp\u003eThe ring remains in very good antique condition with age-related wear consistent with a platinum ring dating to approximately 1930. The overall architecture remains well defined, and the diamonds, sapphires, pierced gallery, and engraved shoulder details present beautifully.\u003c\/p\u003e\n\u003cp\u003eUnder high magnification, some flattening is visible along portions of the platinum surrounding the diamonds, and areas of the original milgrain have softened or flattened with wear. These characteristics are considerably less apparent during normal viewing than in the enlarged photographs and do not detract from the overall presentation of the ring.\u003c\/p\u003e\n\u003cp\u003eThe ring retains the subtle surface character expected of authentic period jewelry rather than having been aggressively restored or refinished.\u003c\/p\u003e\n\u003ch2\u003ePhotography Note\u003c\/h2\u003e\n\u003cp\u003ePhotographed under soft-spectrum lighting and high magnification to accurately capture the old-cut diamonds, blue sapphires, milgrain, engraving, pierced gallery, surface condition, and period construction of the platinum setting.\u003c\/p\u003e\n\u003cp\u003eAntique hand-cut diamonds are individually fashioned and often display considerably more brilliance and broad flashes of light in motion than a still photograph can fully capture. Enlarged images are intended to reveal gemstone characteristics, surface condition, craftsmanship, and construction details beyond what is typically visible during normal viewing.\u003c\/p\u003e","brand":"TERA","offers":[{"title":"Default Title","offer_id":52910803124535,"sku":null,"price":1100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0986\/8889\/3239\/files\/art-deco-platinum-old-european-cut-diamond-and-sapphire-ring-angled-hero-view.jpg?v=1787904425","url":"https:\/\/theteracollection.com\/products\/circa-1930-art-deco-platinum-diamond-sapphire-ring","provider":"TERA","version":"1.0","type":"link"}