Gad & Co.

GIA-certified Type A Fei Cui jadeite jade pierced carving pendant with no indications of dye or impregnation, displaying vivid translucent green color with a geometric lattice and sc...

An antique circa 1915 Hampden Watch Company Railway grade 15-jewel 16-size pocket watch in a 14K gold-filled Crescent 25-year open face case with an engraved body, white enamel dial ...

A 20.86 carat oval aquamarine cabochon is bezel-set at center within a round brilliant diamond halo in an 18K white gold dome cocktail ring, with 118 tsavorite garnets totaling 3.45 ...

A GIA-certified 4.43 carat oval brilliant diamond in G color and I1 clarity is four-prong set in a platinum 900 wide dome ring featuring two rows of channel-set cabochon rubies flank...

A certified 1712 Spanish gold 8 escudo cob doubloon — minted in Lima under King Felipe V with assayer initial M and recovered from the 1715 Plate Fleet wreck off the east coast of Fl...

A spectacular 50 carat total weight three-row round brilliant diamond V-shape statement necklace in 18K yellow gold, featuring F-G color and VS1-VS2 clarity diamonds densely pave-set...

Art Deco-era 18K white gold statement bracelet featuring channel-set square cut rubies running the full length of the bracelet flanked by two rows of round brilliant diamond pave, wi...

A signed Made in Italy 18K yellow gold three-row woven basket weave ribbed link bracelet with a white gold box clasp paved in round brilliant diamonds of E-F color and VS1-VS2 clarit...

An approximately 12.50 carat trillion checkerboard-cut pink amethyst measuring 16mm is bezel-set at the center in a 14K white gold full pave dome cocktail ring with pink sapphire acc...

David Yurman-signed quartz watch featuring an 18K yellow gold cushion-shaped case with a diamond bezel, mother of pearl dial with Roman numeral hour markers and sapphire crown, set i...

Authentic Pre-Owned Patek Philippe Grand Ellipse 3838 Unisex 18K Yellow Gold Watch. Vintage, circa 1980. Featuring a 31mm dial with a smooth gold bezel, cream-white ivory enamel dial...

Dark blue sapphire halo ring featuring 8 x 6.3mm ~1.70 Carat (approximated by formula) oval-cut sapphire in 14K white gold with diamond halo and triple split shank. Diamonds totaling...

GIA-certified 1.50 carat natural fancy light greenish blue diamond in cushion modified brilliant cut weighing with SI2 clarity. GIA Report #2156970215. Product Specifications: Item...

GIA-certified 0.27 carat pear cut natural fancy purplish pink diamond from the Argyle mine in Australia. GIA Report #1152197788. Laser inscribed Argyle serial number and GIA cert n...

Vintage Chopard Happy Sport Ref 8246 ladies quartz 26mm watch in two-tone 18K yellow gold and stainless steel, featuring the iconic 5 floating round brilliant diamonds between dial a...

GRS-certified 2.69 carat vivid green oval natural emerald with minor oil and 1.50 carat round brilliant diamond G-H/SI cluster halo platinum 950 ring, featuring the vivid emerald in ...

A Rolex Oyster Perpetual 41mm Ref 124300 Oystersteel with the highly sought-after coral red dial, automatic Calibre 3230 movement, smooth fixed bezel, scratch-resistant sapphire crys...

Vintage 1996 Rolex OP Datejust Presidential reference 69178 automatic watch in solid 18K yellow gold, featuring a champagne dial with applied gold index hour markers, tritium-lume ha...

A GRS-certified 17.85 carat emerald-cut Zambian emerald with minor oil treatment set in an ornate 14K yellow gold filigree pendant with baguette and round brilliant diamond halo, sus...

Vintage 1979 Rolex Oyster Perpetual Date reference 1501 automatic watch in stainless steel featuring a silver-tone dial with applied gold-tone baton hour markers, engine-turned bezel...

A rare vintage 1991 Rolex Submariner reference 1680 retailed and signed by Tiffany and Co., featuring a black dial with tritium hour markers and hands, caliber 1570 automatic movemen...

Vintage Rolex Oyster Perpetual 18K Yellow Gold Florentine Bark Finish Bracelet Watch Silver Dial. Vintage circa 1963 Rolex Oyster Perpetual reference 1028 manual-wind watch in 18K y...

GRS-certified 4.13 carat heart-cut Sri Lanka blue sapphire with heat treatment is bezel-set in an 18K white gold heart-shaped pendant with a spider web gallery back and yellow gold p...

Natural six piece emerald-cut natural emeralds totaling 2.31 carats alternate with four straight baguette diamonds totaling 0.43 carats in a three-tier linear drop earring set in 18K...

A GIA-certified multi-shape fancy orange-pink and white diamond drop earring pair in 18K rose gold, featuring a cascading linear design with four graduated diamond halo stations per ...

GIA-certified 1.20 carat natural fancy color diamond graded Fancy Brownish Orangy Yellow with VS2 clarity, oval modified brilliant cut measuring 8.43 x 6.21 x 3.31mm, offered as a lo...

GIA-certified 4.10 carat natural round brilliant diamond in D color and VS2 clarity — the highest color grade available — offered as a loose investment-grade stone with GIA report nu...

AGL-certified natural Colombian emerald cabochon with minor oil treatment, bezel set in a 14K yellow gold Egyptian Revival ring with concentric double-bezel frame, granulation should...

GIA-certified 8.69 carat oval cabochon black opal with no color treatment and 1.78 carat total weight baguette diamond ballerina halo in platinum 900 cocktail ring. Ring Size 7.25,...

A large natural ammolite brooch and pendant in 14K yellow gold, featuring a spectacular freeform iridescent ammolite cabochon bezel-set within a polished gold frame, accented by a di...

GIA-certified 5.10 carat natural black opal with no color treatment, displaying vivid full-spectrum play-of-color, set in a four-prong platinum 900 mounting within a starburst single...

Natural 1.11 carat princess cut diamond in G color and SI2 clarity is set in a platinum 950 square halo engagement ring with 0.23 carats of round brilliant pave diamonds lining the h...

Natural, Seven round blue sapphires totaling 0.83 carats form a vivid floral cluster center flanked by two rows of round brilliant diamonds totaling 0.63 carats in a platinum 900 thr...

1.26 carat oval ruby measuring 6.6 x 5.5mm is set in a platinum 900 Art Nouveau-inspired ballerina ring with a mixed diamond surround of marquise, baguette, and round brilliant stone...

0.97 carat oval blue sapphire measuring 5.4 x 4.8mm is set in a platinum 900 ring featuring an ornate filigree floral gallery with mixed baguette and round brilliant diamond accents ...

Natural 0.50 carat oval blue sapphire set in platinum 900 with a radiating ballerina halo of tapered baguette and round brilliant diamonds on a delicate filigree-detailed shank, weig...

Vintage 1972 Rolex Cellini model 3809 manual-wind dress watch in 18K white gold featuring a round silvered dial with "Cellini" script signature, Rolex crown logo, and an aftermarket ...

Vintage 1960s Rolex Precision manual-wind ladies dress watch in 14K yellow gold featuring an oval case with a factory diamond bezel, champagne di...

Vintage 1988 Rolex Datejust Presidential automatic watch in 18K yellow gold featuring a fully paved diamond and ruby dial, diamond-set beze...

Vintage 1970 Rolex Cellini manual-wind dress watch in an 18K yellow gold cushion-shaped case with a silver-tone textured dial, gold baton indices, Rolex crown logo, and "Cellini" scr...

Vintage Rolex Oysterdate Precision reference 6694 manual-wind watch in a 34mm stainless steel case featuring a silver-tone dial with applied baton hour markers, date window at 3 o'cl...

Vintage Rolex Oyster Perpetual Datejust 26mm automatic watch in two-tone 18K yellow gold and stainless steel featuring a champagne dial with applied gold baton indices, fluted 18K go...

1999 Year Rolex Oyster Perpetual Datejust 36mm automatic watch in stainless steel featuring a navy blue dial with silver Roman numeral hour markers, an aftermarket diamond-set bezel,...

1.26 carat emerald cut natural emerald set in a four-prong yellow gold basket within a rectangular round brilliant diamond halo in 18K white gold, suspended from a polished white gol...

GIA Certified 0.45 Carat Fancy Brown Pink Heart Shape Diamond Stud Earrings in Platinum and 18K Rose Gold. Jewelry Details: Item Type: Earrings Metal Type: Platinum and 18K Rose Gol...

Cartier Paris Art Deco platinum ring set with a GIA certified no heat Royal Blue sapphire, approximately 2.30 carats by formula, in an emerald octagonal step cut. The center sapphire...

A matched pair of emerald cut natural emerald halo stud earrings in 18K two-tone white and yellow gold, featuring a 1.36 carat and 1.24 carat emerald cut emerald per earring set in y...

A fully diamond-paved square flat-top men's statement ring in 18K white gold, featuring 8.06 carats total weight of round brilliant diamonds in G-H color, VS-SI clarity set in a bold...

An approximately 5.00 carat total weight round brilliant diamond interwoven X-link bracelet in 18K white gold, featuring repeating crossover bar links with four-stone diamond cluster...

2.0 carat total weight marquise cut diamond engagement ring in 14K white gold, featuring H color SI1 clarity diamonds in a marquise-shaped pave halo and a slim pave diamond shank. R...

Art Deco era platinum full eternity wedding band featuring alternating French cut blue sapphires and French cut diamonds channel set continuously around the entire band in a sleek, f...

Art Deco Era Classic Bracelet featuring over 15 Carats of Old-European Cut Diamonds, Emerald-Cut Colombian Emeralds, and Marquis/Round Cut Black Onyx, and set in a whopping 50.5 gram...

Vacheron Constantin Sovereign 18K Rose Gold Ultra ladies Watch 67****. Manual winding movement. 18K rose gold case 32 mm in diameter. Straight lugs. Thickness 5.5 mm. 18K rose gold f...

2 carat (approx.) emerald cut Colombian emerald with minor oil treatment, set in a four-prong 14K yellow gold crown mounting flanked by stepped white gold milgrain-edged diamond-cut ...

Tudor Heritage Black Bay Dark reference M79230DK is a COSC chronometer-certified automatic dive watch in an all-black PVD stainless steel 41mm case and bracelet, powered by the in-ho...

natural 1.0 carat oval cut Colombian emerald, set as a solitaire in a four-prong white gold tip basket atop a vintage 14K yellow gold split wire shoulder shank. Ring size 8, adjusta...

1.25 carat oval cut blue sapphire set in platinum with a double-row ballerina-style round brilliant diamond halo totaling 0.50 carats, mounted on a split shank platinum band with sap...

2.62 carat emerald cut Colombian emerald, set in a four-prong yellow gold basket atop a wide 14K white gold band with two parallel rows of channel-set baguette diamonds totaling 0.80...

A magnificent 18K white gold choker necklace set with 12 carats total weight of baguette and round brilliant diamonds in a repeating floral fan link design, featuring 277 channel-set...

A bold matched pair of south sea pearl and diamond statement earrings in 18K two-tone yellow and white gold, each featuring a 12mm south sea pearl — one set in a large circular disc ...