Diamond Jewelry Consignment
From stunning diamond engagement rings to enchanting blue diamonds, Sotheby’s is proud to help you sell your quality diamonds and diamond jewelry from esteemed houses such as Tiffany & Co., Harry Winston, and Cartier. Our network of specialists in major selling centers such as Hong Kong, London, Geneva, and New York engage their extensive knowledge of diamonds and GIA standards to help you sell your diamond jewelry, whether you are looking to sell a diamond tennis bracelet, a loose yellow diamond, or a spectacular diamond engagement ring.
Sotheby's, your best and most reliable resource for selling your diamond rings, necklaces, bracelets and other jewelry, holds the current auction record for the highest price paid for any diamond or jewel. On April 2, 2019, Sotheby's sold a Spectacular 88.22-Carat Oval Brilliant Diamond – one of only three oval diamonds over 50 carats to appear at auction in living memory – for 107,993,000 HKD. To receive a complimentary estimate of your diamonds, you may contact one of our specialists below or simply submit images along with any additional information to Sotheby's through our easy-to-use online estimate form.
Find Out the Value of Your Diamonds
Submit photos and information about your loose diamond or diamond jewelry and begin your complimentary estimate request.
Get an Estimate
Talk to a Diamond Specialist
Talk to a Diamond Specialist
GENEVA: +41 22 531 0022
NEW YORK: +1 646 518 8553
LOS ANGELES: +1 310 274 0340
HONG KONG: +852 5803 0036
LONDON: +44 20 3868 8645
PARIS: +33 (0)1 85 14 96 56
MILAN: +39 02 29 500 201
TOKYO: +81 3 6770 2873
MADRID: +34 91 123 4218
MONTE CARLO: 8009 3827
Diamond Jewelry Consigned with Sotheby's
Frequently Asked Questions
- How much is my diamond jewelry worth?Our diamond specialists will examine your diamond and provide a value based on provenance, quality, rarity, origin and the diamond's GIA certification. While each diamond is unique, every stone over one carat can be graded based on the Gemological Institute of America’s (GIA) global standards of diamond certification. Known as the ‘4Cs,’ these criteria are color, clarity, cut and carat weight. Each of these characteristics influences the appearance and value of the diamond.
The color scale begins with the letter D. D, E, and F diamonds are near colorless and the most desirable, while G - Z diamonds increase respectively in yellow or brownish hue. Each letter grade has a clearly defined range of color appearance.
Clarity refers to presence or absence of inclusions and blemishes, ranging from “internally flawless” (diamonds with no inclusions, which are quite rare) to “included” (diamonds with blemishes visible to the naked eye).
The cut of a diamond is what gives the stone its radiance and sparkle . The GIA evaluates the skill with which the diamond was facetted, analyzing factors such as symmetry, proportion, and polish to determine how successfully the stone reflects light. The cut grading scale ranges from “Excellent” to “Poor.”
A carat is the standard unit of measure for a diamond’s weight. One carat weighs 0.2 grams. The word “carat" originates from the Mediterranean “carob” seed, which was historically used to weigh stones.
- Can I sell a loose colored diamond with Sotheby's?Sotheby's sells colored diamonds loose or as part of a ring, necklace, earring or other jewelry. Simply submit photographs of your colored diamond online to receive a complimentary estimate from our diamond specialists. Colored diamonds, or “fancy color” diamonds, are typically yellow, pink, blue, or green, and are extremely rare: roughly one colored diamond occurs in nature for every 10,000 gem-quality white diamonds. Colored diamonds are graded by their saturation, which ranges from “faint” to “fancy deep.” Diamonds that fall in the “fancy intense” and “fancy vivid” categories are among the most desirable for collectors, as they balance both intense color and eye-catching reflectivity.
- How does Sotheby's determine how much my diamond is worth?Sotheby's specialists have many years of experience valuing and appraising diamonds. When the specialists determine an estimate, they consider general condition, carat weight, color, clarity, fluorescence, prices achieved at auction for similar pieces, age of the stone, and the history of ownership.
- How can I sell my diamond engagement ring?When you are ready to sell a diamond engagement ring, simply submit photographs of the ring along with any information you have about it (when it was purchased, where it was purchased, any diamond certificate you have) to Sotheby's. Our auctions typically include a wide variety of colored or white diamond engagement rings for sale, and we would be happy to review your diamond ring for consignment.