Brilliant-cut diamonds and crisp baguettes rise across a broad, gently curved surface of gold.

Created by Oscar Heyman in New York circa the 1970s, this distinctive bombé ring is fashioned in 18k yellow gold and platinum, set with 33 diamonds weighing approximately 1.88 carats in total. The design is composed of five graduated rows of alternating round brilliant-cut and baguette-cut diamonds, arranged in a carefully balanced, openwork formation. At the center, a prominent brilliant-cut diamond anchors the composition, while the surrounding stones diminish gradually in size toward the outer edges, creating a softly domed silhouette.

The interplay between the two diamond cuts gives the ring its particular character. The round brilliants introduce lively flashes of light, while the baguettes offer a quieter, more linear brilliance, their long facets emphasizing the horizontal movement of each row. Slender intervals of open space separate the diamond-set bands, lending an unexpected lightness to the substantial gold setting. The contrast between warm yellow gold and cool platinum further defines the individual stones, allowing the architecture of the design to remain clearly visible.

Founded in New York in 1912, Oscar Heyman established a reputation for exceptional precision in jewelry manufacture, particularly in the selection, cutting, and setting of gemstones. The firm's exacting standards and technical expertise made it a trusted manufacturer for some of America's most distinguished jewelry houses, while pieces bearing the Oscar Heyman name became increasingly appreciated by collectors in their own right. This ring reflects that tradition of meticulous construction, with each diamond carefully positioned to contribute to the symmetry and overall balance of the composition.

The broad bombé silhouette is characteristic of the bold yet refined jewelry of the 1970s, when sculptural volume and geometric arrangements became important elements of design. Weighing 8.3 grams, the ring offers a substantial visual presence while retaining an airy quality through its openwork construction.

A composition in two kinds of brilliance—the lively fire of round diamonds held in quiet conversation with the measured light of baguettes.

Details

• Maker: Oscar Heyman
• Period: Circa 1970s
• Metal: 18k yellow gold and platinum
• Stones & Carat Weight: 33 round brilliant-cut and baguette-cut diamonds weighing approximately 1.88 carats total
• Design: Five-row diamond bombé ring with graduated, openwork construction
• Ring Size: US size 5.75; resizable
• Weight: 8.3 grams
• Signed / Numbered: Oscar Heyman maker's mark; numbered
• Origin: New York, United States
• Condition: Excellent vintage condition
• Internal ID: RI65563