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Antique Art Deco engagement ring by J.E. Caldwell with a 2.03 carat old European cut diamond. Via Diamonds in the Library.

Ring roundup: more Art Deco engagement rings.

diamondsinthelibrary.com

Edwardian Black Opal, Diamond, Platinum, Gold Necklace, J.E. Caldwell & Co. The necklace features a pear-shaped black opal cabochon measuring 18.00 x 12.00 x 4.70 mm, set in gold, enhanced by European and full-cut diamonds weighing a total of approximately 0.45 carat, set in platinum, marked JEC & Co. for J.E. Caldwell & Co. Gross weight 6.38 grams. Pendant Dimensions: 1-5/8 inches x 11/16 inch Chain Length: 15 inches. Listed at Heritage Auctions, via Stonefinder.

Art Deco Platinum, Sapphire, and Diamond Bracelet, J.E. Caldwell & Co., set with calibre-cut sapphires and full-cut diamond melee, bezel-set diamond baguette accents, approx. total diamond wt. 11.00 cts., lg. 7 3/8 in., no. N3689, signed. Via Skinner.

Art Deco Natural Fancy Blue Diamond and Platinum Ring, J.E.Caldwell.

18 Karat Gold, Black Opal and Colored Diamond Necklace, J.E. Caldwell, Circa 1920

'O' Is For Opal - October's Birthstone

jewelsdujour.com

Art Deco Diamond, Sapphire, Platinum Ring, J. E. Caldwell The ring features a European-cut diamond measuring 7.25 x 7.23 x 4.27 mm and weighing approximately 1.30 carats, enhanced by French-cut sapphires weighing a total of approximately 0.10 carat, accented by European-cut diamonds weighing a total of approximately 0.50 carat, set in platinum, having a partial J. E. Caldwell signature

A Coral, Diamond and Gold Bracelet, circa 1895. Set with a series of five graduated corals within conforming filigree frames with tiny old mine-cut diamonds, between connecting links of floral and acanthus leaf medallions, mounted in 18k gold, signed JEC & Co. for J.E. Caldwell & Co. and numbered D9637

Platinum, Star Sapphire and Diamond Brooch, J.E. Caldwell, Circa 1910. Centered by a plum-colored star sapphire weighing approximately 45.00 carats, framed by 22 round diamonds weighing approximately 5.35 carats, signed JEC & Co., numbered _2089. Sotheby’s.

A belle époque pearl and diamond sautoir, J.E. Caldwell, circa 1910, the woven seed pearl necklace centering a lozenge-shaped panel of old European-cut diamonds in a foliate motif suspending an asymmetrical pendant each with terminals of pear-shaped diamonds within diamond foliate borders; signed J.E.C. & Co, no. F3699; mounted in platinum; length: 18in. Via Bonhams.

A Belle Epoque emerald, diamond, and seed pearl pendant/brooch, by J.E. Caldwell & Co. The pierced old European-cut diamond plaque, enhanced by alternating old European-cut diamond and calibré-cut emerald detail, to the seed pearl trim and central sugarloaf cabochon emerald, suspending a pendant of similar design, mounted in platinum, circa 1915, in a green leather case Signed J.E.C & Co., no. 31682 (indistinct). Christie’s.

Suspending to the front with a tassel of twenty-four graduated seed pearl strands measuring approximately 2.20 to 4.40mm, supported by a seed pearl necklace, highlighted by circular-cut diamond-set floral links and clasps, the diamonds together weighing approximately 2.40 carats, mounted in platinum, length approximately 730mm, signed J.E.C. & Co. and numbered F4204, tassel detachable. Via Sotheby’s.

Platinum and Diamond Ring, J.E. Caldwell. Centered by an old European-cut diamond weighing 2.83 carats, accented by rose and single-cut diamonds weighing approximately 1.00 carat, size 6¼, signed J.E.C & Co., numbered 115219, both the signature and number are partially obscured, two rose-cut diamonds missing, circa 1920. Sotheby’s.

14 Karat Pink Gold, Platinum, Sapphire, Colored Diamond and Diamond Clip-Brooch, J.E. Caldwell, Circa 1945. Designed as a floral spray set with pear-shaped and round sapphires, round diamonds of yellow hue weighing approximately .60 carat, and near colorless round diamonds weighing approximately .35 carat, signed J.E. Caldwell.

J.E. Caldwell Diamond BroochAuthentic Art Deco Black Onyx and Diamond Brooch, signed J.E. Caldwell. Circa early 1900s. Via 1stdibs.

Platinum, Ruby and Diamond Ring, J.E. Caldwell. Centered by an octagonal-shaped ruby weighing 3.96 carats, flanked by six calibré-cut rubies weighing approximately .60 carat and two French-cut diamonds weighing approximately .40 carat, size 6¼, signed JEC & Co., circa 1950. With signed box. Via Sotheby’s.

J. E. Caldwell Art Deco Bracelet. Fabulous diamond and emerald Art Deco bracelet manufactured by Oscar Heyman for J. E. Caldwell.

Long view: Edwardian seed pearl and diamond sautoir, J.E. Caldwell. Circa 1905. Via Diamonds in the Library.

Tassel detail: Edwardian seed pearl and diamond sautoir, J.E. Caldwell. Circa 1905. Via Diamonds in the Library.

Detail: Edwardian seed pearl and diamond sautoir, J.E. Caldwell. Circa 1905. Via Diamonds in the Library.

Edwardian seed pearl and diamond sautoir, J.E. Caldwell. Circa 1905. Via Diamonds in the Library.

Diamond and platinum sautoir designed as a continuous diamond-set ribbon with a central knot motif, J E Caldwell Philadelphia, circa 1920

Detail: Art Deco diamond and emerald bracelet by J.E. Caldwell, circa 1930. Via Diamonds in the Library.

Art Deco diamond and emerald bracelet by J.E. Caldwell, circa 1930. Via Diamonds in the Library.

J.E. Caldwell & Co (Jewels) 1929 Diamond Necklace, Brooch Sapphire

Platinum, Ruby and Diamond Ring, J.E. Caldwell. Centered by an octagonal-shaped ruby weighing 3.96 carats, flanked by six calibré-cut rubies weighing approximately .60 carat and two French-cut diamonds weighing approximately .40 carat, size 6¼, signed JEC & Co., circa 1950. With signed box. Via Sotheby’s.