A DIAMOND RING, CIRCA 1920

Description

A DIAMOND RING, CIRCA 1920
Centering a marquise-shaped diamond; estimated diamond weight 1.65 carats; size 7
Footnotes:
OVERALL CONDITION:
Metal purity unstamped and tested with XRF (X-ray fluorescence) for platinum; superficial wear in the form of minor scratches; overall good condition.

DIAMOND: marquise-shaped
Total number: 1
Approximate total weight: 1.65 carats
Approximate overall color and clarity: I-J, SI1-SI2

ADDITIONAL INFORMATION
Approximate gross weight: 2.6 grams

This condition report is provided for your convenience based on the opinion of our gemologists. Bonhams is not responsible for any discrepancies between this information and other opinions.

Buyer's Premium

32%

A DIAMOND RING, CIRCA 1920

Lot 0297

Estimate $1,800-$2,800Mar 5, 2026, 1:00 PM EST

Starting Price

Secure

$1,800

SET YOUR MAX BID

$1,800

Good Bid

$2,000

Strong Bid

$2,500

Competitive Bid

Or select a higher max bid amount

1 bidder is watching this item

Get approved to bid.

Fine Jewelry

Mar 05, 2026 1:00 PM EST

Los Angeles, CA, United States

A PLATINUM, DIAMOND AND ONYX BROOCH, CIRCA 1920: A PLATINUM, DIAMOND AND ONYX BROOCH, CIRCA 1920Centering an old European-cut diamond, set throughout with old European and old mine-cut diamonds, accented by calibré-cut onyx; estimated total

Mar 05, 2026A PLATINUM, DIAMOND AND ONYX BROOCH, CIRCA 1920

A ROCK CRYSTAL, DIAMOND AND RUBY BROOCH, CIRCA 1920: A ROCK CRYSTAL, DIAMOND AND RUBY BROOCH, CIRCA 1920Comprising a circular carved rock crystal frame, braced and accented by square step-cut rubies and transitional-cut diamonds; with partial serial

Mar 05, 2026A ROCK CRYSTAL, DIAMOND AND RUBY BROOCH, CIRCA 1920

AN EMERALD AND DIAMOND PENDANT/BROOCH: AN EMERALD AND DIAMOND PENDANT/BROOCHCentering an oval-shaped emerald within an ornate frame, set with round and square-shaped emeralds and round brilliant, old European and baguette-cut diamonds;

Mar 05, 2026AN EMERALD AND DIAMOND PENDANT/BROOCH

RAYMOND YARD: A PAIR OF CULTURED PEARL AND DIAMOND EARCLIPS, CIRCA 1930: RAYMOND YARD: A PAIR OF CULTURED PEARL AND DIAMOND EARCLIPS, CIRCA 1930Each centering a round cultured pearl, accented by old European and old mine-cut and tapered-baguette diamonds; signed Yard;

Mar 05, 2026RAYMOND YARD: A PAIR OF CULTURED PEARL AND DIAMOND EARCLIPS, CIRCA 1930

AN EMERALD AND DIAMOND NECKLACE: AN EMERALD AND DIAMOND NECKLACECentering a pear-shaped emerald within a surround of round brilliant-cut diamonds, to a necklace of foliate design, accented by old European, old mine and single-cut

Mar 05, 2026AN EMERALD AND DIAMOND NECKLACE

A PINK SAPPHIRE AND DIAMOND BROOCH: A PINK SAPPHIRE AND DIAMOND BROOCHCentering an oval-shaped pink sapphire, set throughout with rose-cut diamonds and accented by calibré-cut sapphires; estimated center sapphire weight 4.45

Mar 05, 2026A PINK SAPPHIRE AND DIAMOND BROOCH

A DIAMOND RING, CIRCA 1920: A DIAMOND RING, CIRCA 1920Centering an old European-cut diamond, weighing 2.60 carats, accented by baguette and single-cut diamonds; mounted in platinum; size 6 1/4Footnotes:Accompanied by GIA Report

Mar 05, 2026A DIAMOND RING, CIRCA 1920

A DIAMOND NECKLACE, CIRCA 1920: A DIAMOND NECKLACE, CIRCA 1920Set throughout with round, transitional and old European-cut diamonds; estimated total diamond weight 5.70 carats; mounted in platinum; length 16 in.Footnotes:OVERALL

Mar 05, 2026A DIAMOND NECKLACE, CIRCA 1920

AN EMERALD AND DIAMOND RING: AN EMERALD AND DIAMOND RINGCentering an octagonal step-cut emerald, in a frame set with pear-shaped, round brilliant and baguette-cut diamonds; accompanied by a detachable sizer; with maker's mark;

Mar 05, 2026AN EMERALD AND DIAMOND RING

AN 18K WHITE GOLD, SAPPHIRE AND DIAMOND RING: AN 18K WHITE GOLD, SAPPHIRE AND DIAMOND RINGCentering a cushion-cut sapphire, flanked by modified baguette-cut diamonds; estimated sapphire weight 6.75 carats; estimated total diamond weight 0.85

Mar 05, 2026AN 18K WHITE GOLD, SAPPHIRE AND DIAMOND RING

A DIAMOND BRACELET, CIRCA 1920: A DIAMOND BRACELET, CIRCA 1920Designed as a row of old European and transitional-cut diamonds, with engraved detailing; with maker's mark for William Barthman; with serial number; estimated total

Mar 05, 2026A DIAMOND BRACELET, CIRCA 1920

A PLATINUM AND DIAMOND RING, CIRCA 1930: A PLATINUM AND DIAMOND RING, CIRCA 1930 Centering an old European-cut diamond weighing 4.21 carats, flanked by round brilliant-cut diamonds; size 5 3/4 Footnotes: Accompanied by GIA Report 2231871164,

Mar 05, 2026A PLATINUM AND DIAMOND RING, CIRCA 1930

TIFFANY & CO.: A SAPPHIRE AND DIAMOND RING, CIRCA 1915: TIFFANY & CO.: A SAPPHIRE AND DIAMOND RING, CIRCA 1915 Centering a cushion-shaped sapphire, weighing 1.06 carats, flanked by calibré-cut diamonds and further accented by old European, old mine an

Mar 05, 2026TIFFANY & CO.: A SAPPHIRE AND DIAMOND RING, CIRCA 1915

AN EMERALD AND DIAMOND RING, CIRCA 1915: AN EMERALD AND DIAMOND RING, CIRCA 1915 Of bypass design, centering an old European-cut diamond, weighing 2.21 carats, and a round emerald weighing 1.59 carats, accented by single-cut diamonds; with m

Mar 05, 2026AN EMERALD AND DIAMOND RING, CIRCA 1915

A DIAMOND AND CULTURED PEARL BROOCH, CIRCA 1880: A DIAMOND AND CULTURED PEARL BROOCH, CIRCA 1880Designed as a bow, centering a button-shaped cultured pearl measuring approximately 11.0 mm, set throughout with old mine-cut diamonds; with French

Mar 05, 2026A DIAMOND AND CULTURED PEARL BROOCH, CIRCA 1880

AN 18K BICOLOR GOLD, ENAMEL, DIAMOND AND SAPPHIRE BROOCH, CIRCA 1900: AN 18K BICOLOR GOLD, ENAMEL, DIAMOND AND SAPPHIRE BROOCH, CIRCA 1900Designed as a dragonfly, with wings of teal and blue plique-à-jour enamel, body and wings set with transitional and single-cut

Mar 05, 2026AN 18K BICOLOR GOLD, ENAMEL, DIAMOND AND SAPPHIRE BROOCH, CIRCA 1900

A DIAMOND BROOCH: A DIAMOND BROOCHDesigned as a spray, set throughout with old European, old mine and single-cut diamonds; estimated total weight 5.75 carats; mounted in 18K white gold; measures 2 3/8 x 1 7/8

Mar 05, 2026A DIAMOND BROOCH

CARTIER: A DIAMOND BRACELET: CARTIER: A DIAMOND BRACELETDesigned with repeating links of fish-scale motif, centering an old European-cut diamond within a geometric plaque, set throughout with old European, round brilliant and

Mar 05, 2026CARTIER: A DIAMOND BRACELET

A DIAMOND PENDANT/BROOCH, CIRCA 1910: A DIAMOND PENDANT/BROOCH, CIRCA 1910Centering an additional oval-shaped rose-cut diamond, suspended from a scroll motif set throughout with old mine and rose-cut diamonds; with French assay marks;

Mar 05, 2026A DIAMOND PENDANT/BROOCH, CIRCA 1910

A MOONSTONE AND DIAMOND BROOCH, CIRCA 1910: A MOONSTONE AND DIAMOND BROOCH, CIRCA 1910Centering an oval-shaped and domed cabochon moonstone, accented by old European and rose-cut diamonds; estimated moonstone weight 14.90 carats; estimated

Mar 05, 2026A MOONSTONE AND DIAMOND BROOCH, CIRCA 1910

Related Searches

Diamond RingsDiamond JewelryPrice ResultsAuctions in Los Angeles

TOP