Boldly geometric yet beautifully refined, this authentic Art Deco 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.
What 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.
The 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.
The 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.
Under 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 Old European Cut diamond, while the second has a considerably smaller culet and tighter central facet structure, suggesting a later Old European Cut approaching the Transitional Cut.
Such 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.
Three 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.
The 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.
The sapphires have not been submitted to a gemological laboratory, and their natural versus synthetic origin is currently undetermined.
The architecture of this ring is quintessentially Art Deco.
Two 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.
Fine 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.
At 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.
The combination of old-cut diamonds, geometric sapphire accents, fine milgrain, engraving, and pierced platinum construction creates a wonderfully complete expression of Art Deco design.
The 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.
Under 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.
The ring retains the subtle surface character expected of authentic period jewelry rather than having been aggressively restored or refinished.
Photographed 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.
Antique 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.
Fast & Secure Shipping
Our 21-Day Promise
We want you to fall in love with your piece. To provide you with total peace of mind, we offer a 21-day evaluation period. Take the time to ensure the fire, the history, and the feel are exactly what you dreamed of.
Return Policy Details
Our 21-Day Promise We want you to fall in love with your piece. To give you peace of mind, we offer a 21-day evaluation period. Take the time to ensure the fire, the history, and the feel are exactly what you dreamed of.
The Details:
Many pieces in the TERA Collection are a century old or more. They have been worn, cherished, gifted, celebrated, and carried through generations before arriving here. Gentle wear, subtle signs of age, and the occasional evidence of historic stewardship should be expected and are considered part of the character that makes antique jewelry impossible to replicate.
Our photography is intentionally detailed and often captured at extreme magnification. In many cases, the images reveal details, textures, and tiny imperfections that are difficult or impossible to see during normal wear. This approach reflects our commitment to documenting each piece as completely as possible, ensuring that its condition, craftsmanship, and character are faithfully represented.
The result is simple: when your piece arrives, there should be no surprises. What you see is an authentic record of a jewel's present condition, preserving both its beauty and the story written into it over time.
If a condition issue exceeds what would normally be expected from a piece of its age, it will always be specifically disclosed within the listing.
Because every collector values different details, we are always happy to provide additional photographs, videos, measurements, or condition documentation whenever possible. If there is a particular aspect of a piece you would like to examine more closely, please don't hesitate to ask.
Our hope is simple: that the piece you receive is exactly the piece you expected to receive. We would always rather answer one more question than leave a doubt unanswered.
