This rare antique ring is an outstanding example of early 20th-century craftsmanship by Osty & Barton, a renowned jeweler with an exceptional reputation—made more meaningful by the fact that Charles Ostby, one of the firm’s founders, perished aboard the Titanic in 1912. Pieces attributed to this maker are scarce, and antique cameos in this good condition are especially sought after by collectors of antique gold jewelry and classical cameos.

The front and shoulders of the ring are crafted in solid 14K rose gold, richly colored and sharply detailed. The band was made in 10K yellow gold. The mixture of 14K and 10K gold was a typical turn-of-the-century artisanal method, ensuring durability without sacrificing the artistry on top. Two hand-carved sardonyx cameos are set into opposite sides of the ring. One depicts Helen of Troy, the other Paris of Troy, both rendered in beautiful high-relief profiles. Both carvings show excellent contrast between sardonyx layers. The Paris cameo has a small loss to the nose, which doesn’t reduce its display value but is noted for accuracy.

The combination of antique dual-portrait cameos in good condition, along with the beautifully carved shoulders of the ring in 14-karat rose gold featuring traditional Osty & Barton motifs—clean, architectural, and unmistakably handcrafted—makes this piece highly collectible. The cameos and the mounting design give it a strong sculptural presence, making it a standout piece for display or to wear.

Condition: Structurally solid with expected antique wear. Gold surfaces retain a warm antique patina. #90

Stamps: OB, 10K (band)

Face Height: 18.62mm

Rise over Finger: 6.85mm

Band Width: 5.14mm tapering to 4.53mm

• Designer = Ostby & Barton
• Material = 14K Gold, 10K Band
• Metal Finish = Warm Patina
• Gemstone = Sardonyx
• Shape/Cut = Carved
• Gem Color = Multicolor
• Weight (Grams) = 5.49G
• Measurements = Size 7.75
• Condition = Antique

Item Number: 5358-36

Item ID: 107404

Category: Rings

Note: This item has been inspected and appraised by a GIA Graduate Gemologist Appraiser.

Diamond origin is tested using a GIA iD100 Gem Testing Device. Unless indicated otherwise, all diamonds are to be considered natural, earth-mined diamonds. All man-made, laboratory-grown, laboratory-created, or synthetic diamonds are well marked on the price tag as well as in the website description.

All diamond and gemstone grading is done under GIA standards as the mounting permits. All gemstone weights and measurements are approximate. Unless otherwise stated, colored gemstones may have commonly used clarity and color enhancing treatments per industry standards.

Prospective buyers should note that all jewelry we sell is 'used' and will likely have some amount of wear, we warranty that the item will be essentialy as we have described it, but no other warranties are expressed or implied, and all items are sold 'as is'.