Important Jewels Auction on Nov 1, 2026 by Grogan & Company in MA
TIFFANY & CO., LOUIS COMFORT TIFFANY 18K Gold, Platinum, Aquamarine, and Diamond Necklace
Platinum, Kashmir Sapphire, and Diamond Ring
CARTIER 18K Gold 'Pharaon' Bracelet

Important Jewels

Starts on:
Boston, MA, United States
Our Fall 2026 Important Jewels auction features a highly curated selection of early 20th-century jewelry, rare colored stones, and signed pieces from Tiffany & Co., Cartier, Ilias Lalaounis, and many other makers. Standout pieces include Lot 9, an exceptionally crafted Gold, Platinum, Aquamarine, and Diamond Louis Comfort Tiffany Necklace, and Lot 19, an impressive 3.70 cts. cushion-cut Kashmir Sapphire Ring. From extraordinary stones to beautifully executed designs, this sale brings together a remarkable selection of jewelry.
included when you pay & ship through LiveAuctioneers. Limitations apply. Learn more
Silver-Topped-Gold and Diamond Starburst Pendant/Brooch: Silver-Topped-Gold and Diamond Starburst Pendant/Brooch featuring rays of bead-set single- and old-mine cut diamonds weighing approx. 4.00 tcw.; 3.44 dwts.; dia. 1 3/8 in. Provenance: By descent
Est.
$1,000
-
$2,000
$600
(2 bids)
Platinum and Diamond Brooch: Platinum and Diamond Brooch the bar-form brooch featuring five bezel-set old European-cut diamonds weighing approx. 1.60 tcw. accented by single-cut diamonds in an open-work platinum mount; 2.98
Est.
$1,000
-
$1,500
$500
Platinum, Pearl, and Diamond Necklace: Platinum, Pearl, and Diamond Necklace the four strand pearl necklace featuring near- and off-round pearls measuring approx. 3.05 mm. accented by four rectangular stations and a clasp of platinum set
Est.
$1,500
-
$2,500
$700
TIFFANY & CO. Platinum and Diamond Pendant Watch: TIFFANY & CO. Platinum and Diamond Pendant Watch the white dial with Arabic numeral indicators; enclosing a manual-wind movement; signed on dial and movement; case back and bezel bead-set with
Est.
$6,000
-
$9,000
$3,000
Platinum-Topped-Gold and Diamond Bracelet: Platinum-Topped-Gold and Diamond Bracelet the engraved line-form bracelet centering an old mine-cut diamond weighing approx. 1.30 cts. flanked by two old European-cut diamonds accented throughout by
Est.
$3,000
-
$5,000
$1,500
Platinum-Topped-Gold and Diamond Brooch: Platinum-Topped-Gold and Diamond Brooch the rectangular brooch of scrolling open-work design featuring bead- and bezel-set old European- and single-cut diamonds weighing approx. 3.60 tcw.; 10.41
Est.
$1,500
-
$2,500
$700
14K Gold, Turquoise, and Diamond Ring: 14K Gold, Turquoise, and Diamond Ring centering three oval cabochon turquoise beads framed by single-cut diamonds weighing approx. 0.60 tcw.; 2.65 dwts.; size 4 1/4 Provenance: By descent within a
Est.
$1,000
-
$2,000
$500
TIFFANY & CO. 14K Gold, Turquoise, and Diamond Horseshoe Brooch: TIFFANY & CO. 14K Gold, Turquoise, and Diamond Horseshoe Brooch featuring alternating prong-set old European-cut diamonds and turquoise beads; diamonds weighing approx. 2.10 tcw.; signed Tiffany;
Est.
$2,000
-
$3,000
$1,000
(1 bid)
Art Deco Platinum and Diamond Earring Pendants: Art Deco Platinum and Diamond Earring Pendants the earring pendants each featuring a bezel-set old mine-cut diamond weighing 1.90 and 1.35 cts. suspended from a row of bezel- and bead-set single-cut
Est.
$5,000
-
$10,000
$2,500
Art Deco Platinum and Diamond Bracelet: Art Deco Platinum and Diamond Bracelet comprising three open-work panels separated by three oval links featuring prong- and bead-set old European- and single-cut diamonds weighing approx. 7.50 tcw.;
Est.
$5,000
-
$8,000
$2,500
GARRARD Art Deco Platinum, Emerald, and Diamond Brooch: GARRARD Art Deco Platinum, Emerald, and Diamond Brooch centering a bezel-set emerald-cut emerald weighing approx. 1.50 cts. accented throughout with a scroll- and geometric open-work design of
Est.
$7,000
-
$10,000
$3,500
Art Deco Platinum, Emerald, and Diamond Bracelet: Art Deco Platinum, Emerald, and Diamond Bracelet the open-work bracelet centering a bezel-set emerald-cut emerald weighing approx. 0.80 ct. flanked by rows of square-cut emeralds and old European-
Est.
$10,000
-
$15,000
$5,000
Platinum, 14K Gold, Diamond, and Emerald Earrings: Platinum, 14K Gold, Diamond, and Emerald Earrings the pendant form earclips each featuring a prong-set round brilliant-cut diamond stud with removable links of bead-set single-cut diamonds and
Est.
$1,000
-
$1,500
$500
Platinum, Diamond, and Emerald "Toi et Moi" Ring: Platinum, Diamond, and Emerald "Toi et Moi" Ring centering a bezel-set old European-cut diamond weighing approx. 0.45 ct. and cut-cornered emerald-cut emerald weighing approx. 0.40 ct. framed by
Est.
$1,000
-
$1,500
$500
Platinum and Diamond Line Bracelet: Platinum and Diamond Line Bracelet featuring 38 bead-set old European-cut diamonds weighing approx. 7.00 tcw. in an engraved platinum mount; 12.59 dwts.; lg. 7 in. Provenance: Private Collection.
Est.
$3,000
-
$5,000
$1,500
Platinum, Kashmir Sapphire, and Diamond Ring: Platinum, Kashmir Sapphire, and Diamond Ring centering a bezel- and prong-set cushion-cut Kashmir sapphire weighing 3.70 cts. flanked by two old mine-cut diamonds weighing approx. 2.60 cts. and 2.50
Est.
$100,000
-
$200,000
$50,000
Platinum, Colombian Emerald, and Diamond Ring: Platinum, Colombian Emerald, and Diamond Ring centering a bezel-set square emerald-cut Colombian emerald weighing approx. 4.10 cts. framed and accented by bead-set single-cut diamonds in an open-work
Est.
$20,000
-
$40,000
$10,000
Platinum, Colombian Emerald, and Diamond Ring: Platinum, Colombian Emerald, and Diamond Ring centering a bezel-set square emerald-cut Colombian emerald weighing approx. 3.40 cts. framed by bead-set single-cut diamonds in an open-work platinum
Est.
$10,000
-
$20,000
$5,000
TIFFANY & CO., SCHLUMBERGER 18K Gold Bracelet: TIFFANY & CO., SCHLUMBERGER 18K Gold Bracelet featuring textured and braided oval-links; signed Tiffany Schlumberger Made in France; 45.27 dwts.; lg. 7 3/8 in. Provenance: Collection of a New York
Est.
$10,000
-
$12,000
$5,000