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608 Fifth Avenue
Suite 801
NEW YORK, NY 10020
USA
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ABOUT US
J. & S. S. DeYoung, Inc. is a family owned business that purchases and sells high quality jewelry and gemstones. The family has been in America’s jewelry trade since 1835 and is highly regarded for their expertise and integrity.
We Specialize In
Fine Art Deco and Period JewelrySigned pieces by Cartier, Van Cleef & Arpels, Harry Winston, Tiffany, and other fine makers
• Natural Color Diamonds
• Natural, unheated Burma Rubies
• Natural, unheated Kashmir, Burma and Ceylon Sapphires
• Old mine Columbian Emeralds
• Alexandrites, Natural Pearls and Jadeite
Our Services
DeYoung provides jewelry professionals with access to our world class inventory. We also offer our expertise to lawyers, banks and retail jewelers to evaluate and purchase entire estates or individual items.
The Smithsonian
In addition to buying and selling exceptional fine jewelry, the company has a long history of donation and a special relationship with the Smithsonian Institution. Sydney DeYoung donated both a rare pink and red diamond to the museum’s gem collection.

Six Generations in The United States
In 1946 Sydney was joined by his nephew, Joseph H. Samuel, Jr. Joseph continued to expand the business into wider domestic and international markets and served on many industry organizations, including as a governor of the GIA for fifteen years. Joe passed away in 2018. Alan Levy and Janet Samuel Levy have successfully continued the business over the past 35 years. Alan expanded the business throughout Asia, focusing on markets in Hong Kong, Singapore,Taiwan and Japan. They now work alongside their daughter, Lauren Levy, the 6th generation.

During the past several decades DeYoung has maintained a strong presence in the United States and has expanded into overseas markets, including Europe and Asia. Alan, Janet and Lauren are respected experts in the industry and continue to buy and sell rare and unusual jewels.
SHIPPING AND TERMS
Full payment is required for all unknown accounts prior to shipping items

CURRENT LISTINGS

Platinum Emerald and Diamond Snowflake Pendant

Platinum Emerald and Diamond Snowflake Pendant

Platinum Diamonds Bombe Bracelet, London

Platinum Diamonds Bombe Bracelet, London

Antique Enamel Dance Card Pencil, circa middle 1800

Antique Enamel Dance Card Pencil, circa middle 1800's

Platinum Sapphire and Diamond Bow Pin

Platinum Sapphire and Diamond Bow Pin

18kt Yellow Gold Oval Box with Miniature of Boy Fishing, French

18kt Yellow Gold Oval Box with Miniature of Boy Fishing, French

Platinum Onyx and Diamond Art Deco Pendant

Platinum Onyx and Diamond Art Deco Pendant

Platinum Diamonds Bracelet by Van Cleef & Arpels - Paris, circa 1965

Platinum Diamonds Bracelet by Van Cleef & Arpels - Paris, circa 1965

Platinum Art Deco  French Cut Diamonds and Sapphires Bracelet

Platinum Art Deco French Cut Diamonds and Sapphires Bracelet

Plat and 14kt Carved Jade and Diamond Pendant with Platinum Chain

Plat and 14kt Carved Jade and Diamond Pendant with Platinum Chain

Plat Sapphire and Diamond Bracelet, New York, circa 1955

Plat Sapphire and Diamond Bracelet, New York, circa 1955

Platinum Diamonds Necklace, Harry Winston, circa 1959 - Can convert into two bracelets

Platinum Diamonds Necklace, Harry Winston, circa 1959 - Can convert into two bracelets

Platinum Fancy Diamond Bracelet

Platinum Fancy Diamond Bracelet

18 kt. Yellow Gold Carved Lavender Jade Brooch, New York, circa 1960

18 kt. Yellow Gold Carved Lavender Jade Brooch, New York, circa 1960

18kt Yellow Gold and Platinum, Color Stone and Diamond Dome Ring

18kt Yellow Gold and Platinum, Color Stone and Diamond Dome Ring

Platinum Diamonds Brooch, Van Cleef and Arpels, circa 1955

Platinum Diamonds Brooch, Van Cleef and Arpels, circa 1955

Platinum Diamonds Art Deco Ladies Watch

Platinum Diamonds Art Deco Ladies Watch

18kt Heartshape Emerald and Diamonds Necklace

18kt Heartshape Emerald and Diamonds Necklace

Rough Diamond Cufflinks

Rough Diamond Cufflinks

18kt Yellow Gold and Platinum Diamond Barber Pole Bracelet

18kt Yellow Gold and Platinum Diamond Barber Pole Bracelet

Platinum Sapphire Line Bracelet. New York, circa 1955

Platinum Sapphire Line Bracelet. New York, circa 1955

Platinum Ruby Line Bracelet, Tiffany & Co. circa 1955

Platinum Ruby Line Bracelet, Tiffany & Co. circa 1955

Platinum Diamond Ring, Tiffany & Co, circa 1965 - Triple EX

Platinum Diamond Ring, Tiffany & Co, circa 1965 - Triple EX

Platinum Natural Pearl and Diamond Necklace, Tiffany & Co. circa 1925 Formerly the property of Mrs. Horace Dodge - Auto Manufacturer

Platinum Natural Pearl and Diamond Necklace, Tiffany & Co. circa 1925 Formerly the property of Mrs. Horace Dodge - Auto Manufacturer

Platinum Ruby and Diamonds  Three Stone Ring, circa 1955

Platinum Ruby and Diamonds Three Stone Ring, circa 1955

18kt  Black Opal Dress Set - Full Set -  Includes cufflinks and 3 Studs

18kt Black Opal Dress Set - Full Set - Includes cufflinks and 3 Studs

Pair 18kt Black Opal Double sided Cufflinks - Circa 1965

Pair 18kt Black Opal Double sided Cufflinks - Circa 1965

Platinum Star Sapphire Gent

Platinum Star Sapphire Gent's Ring, New York

18kt and Plat Diamond and Gem Set Thai Lady Brooch, New York, circa 1958

18kt and Plat Diamond and Gem Set Thai Lady Brooch, New York, circa 1958

Platinum Art Deco  Opal and Diamonds Ring, circa 1930

Platinum Art Deco Opal and Diamonds Ring, circa 1930

Platinum Diamonds Brooch, Harry Winston, circa 1952 See Letter attached

Platinum Diamonds Brooch, Harry Winston, circa 1952 See Letter attached

Platinum Diamonds Brooch, Cartier

Platinum Diamonds Brooch, Cartier

Platinum Diamonds Art Deco Bracelet

Platinum Diamonds Art Deco Bracelet

Platinum Onyx and Diamond Art Deco Bracelet

Platinum Onyx and Diamond Art Deco Bracelet

18kt Turquoise and Diamond Earclips

18kt Turquoise and Diamond Earclips

Yellow Gold Diamond Pinwheel Earrings

Yellow Gold Diamond Pinwheel Earrings

Platinum Diamonds Leaf Brooch, circa 1965

Platinum Diamonds Leaf Brooch, circa 1965

18kt White Gold Chanel Bracelet, French

18kt White Gold Chanel Bracelet, French

Platinum Briolette Aquamarine and Diamond Pendant, French

Platinum Briolette Aquamarine and Diamond Pendant, French

Plat Sapphire and Diamonds Ring

Plat Sapphire and Diamonds Ring

Platinum Sapphire and Diamonds Ring

Platinum Sapphire and Diamonds Ring

18kt Ruby and Diamond Necklace and Earrings, Cartier - Paris, circa 1955

18kt Ruby and Diamond Necklace and Earrings, Cartier - Paris, circa 1955

Antique Silver and Yellow Gold Moonstone and Diamond Pendant

Antique Silver and Yellow Gold Moonstone and Diamond Pendant

18kt Yellow Gold and Platinum Diamond Earrings, circa 1965

18kt Yellow Gold and Platinum Diamond Earrings, circa 1965

18kt and Platinum Diamond Brooch, Sterle Paris, circa 1960

18kt and Platinum Diamond Brooch, Sterle Paris, circa 1960

Platinum Marquise Diamonds Necklace, Van Cleef & Arpels

Platinum Marquise Diamonds Necklace, Van Cleef & Arpels

Platinum Jade Ring

Platinum Jade Ring

Antique Silver and Gold Rose Diamond Ring, Austria, formerly the property of Emperor Maximillian, the House of Hapsburg, circa 1763

Antique Silver and Gold Rose Diamond Ring, Austria, formerly the property of Emperor Maximillian, the House of Hapsburg, circa 1763

Platinum Ruby and Diamond Double Clips Brooch

Platinum Ruby and Diamond Double Clips Brooch

Boivin Platinum Pearl and Diamond Torsade Bracelet

Boivin Platinum Pearl and Diamond Torsade Bracelet

Platinum Alexandrite and Diamond Ring  - 1 Cushion Alexandrite 4.24 cts -  AGL Report  - Natural Alexandrite -

Platinum Alexandrite and Diamond Ring - 1 Cushion Alexandrite 4.24 cts - AGL Report - Natural Alexandrite -

18kt Opal Egyptian Revival Bracelet, Jaques and Marcus, NY, circa 1900

18kt Opal Egyptian Revival Bracelet, Jaques and Marcus, NY, circa 1900

Platinum Kashmir Sapphire and Diamonds Ring

Platinum Kashmir Sapphire and Diamonds Ring

Platinum Emerald Cut & Round Diamonds Bracelet, New York, circa 1960

Platinum Emerald Cut & Round Diamonds Bracelet, New York, circa 1960

Platinum Diamond Classic Cluster Earrings, Harry Winston, circa 1969

Platinum Diamond Classic Cluster Earrings, Harry Winston, circa 1969

18kt White Gold Diamonds Bracelet, circa 1990

18kt White Gold Diamonds Bracelet, circa 1990

Antique Yellow Gold Egyptian Revival Carnelian Scarab Intaglio Brooch, circa 1880

Antique Yellow Gold Egyptian Revival Carnelian Scarab Intaglio Brooch, circa 1880

Platinum Art Deco  Diamonds Bracelet, circa 1930

Platinum Art Deco Diamonds Bracelet, circa 1930

Aquamarine and Diamond Flower Brooch, Platinum, circa 1935

Aquamarine and Diamond Flower Brooch, Platinum, circa 1935

Princess cut Yellow and White Diamond Bracelet

Princess cut Yellow and White Diamond Bracelet

Art Deco Natural Pearl and Diamond Pendant Earrings

Art Deco Natural Pearl and Diamond Pendant Earrings

Platinum Art Deco Emerald and Diamonds Ring. New York, circa 1925

Platinum Art Deco Emerald and Diamonds Ring. New York, circa 1925

Platinum Pear Shape Sapphire and Diamonds Ring, Van Cleef & Arpels

Platinum Pear Shape Sapphire and Diamonds Ring, Van Cleef & Arpels

Antique Victorian Natural Pearl and Diamond Necklace

Antique Victorian Natural Pearl and Diamond Necklace

Platinum Art Deco Carved Jade, Sapphires and Diamonds Brooch, Mauboussin - Paris, circa 1930

Platinum Art Deco Carved Jade, Sapphires and Diamonds Brooch, Mauboussin - Paris, circa 1930

Antique Carved Amber  & White Color Jadeite Pendant, China, circa 1780

Antique Carved Amber & White Color Jadeite Pendant, China, circa 1780

Antique Jade Coins Necklace, circa 1920

Antique Jade Coins Necklace, circa 1920

18kt Coral Beads and Emeralds Necklace, Verdura

18kt Coral Beads and Emeralds Necklace, Verdura

Platinum Ruby and Diamond Spiral Earrings, circa 1955

Platinum Ruby and Diamond Spiral Earrings, circa 1955

Platinum Diamond Cluster Earrings, circa 1965

Platinum Diamond Cluster Earrings, circa 1965

Antique Yellow Gold Ruby and Diamond Enamel Cross, Robert Phillips, circa 1880

Antique Yellow Gold Ruby and Diamond Enamel Cross, Robert Phillips, circa 1880

Platinum Sapphire 3.56 cts, & Diamonds Ring

Platinum Sapphire 3.56 cts, & Diamonds Ring

Nephrite Jadeite Bowl, circa 1900

Nephrite Jadeite Bowl, circa 1900

Platinum Jade and Diamonds Clover Brooch/Pendant, circa 1955

Platinum Jade and Diamonds Clover Brooch/Pendant, circa 1955

Edwardian 18kt Yellow Gold Platinum Top Diamond Barrette

Edwardian 18kt Yellow Gold Platinum Top Diamond Barrette

14kt Jadeite Disc and Diamond Earrings

14kt Jadeite Disc and Diamond Earrings

Harry Winston, 18kt Yellow Gold Emerald and Diamond Ring,  France

Harry Winston, 18kt Yellow Gold Emerald and Diamond Ring, France

Platinum Ruby and Diamond Bracelet

Platinum Ruby and Diamond Bracelet

Platinum Kashmir  9.33 ct Sapphire and Diamonds Ring

Platinum Kashmir 9.33 ct Sapphire and Diamonds Ring

Platinum Jade 30.65 cts  and Diamonds Ring, NY, circa 1965

Platinum Jade 30.65 cts and Diamonds Ring, NY, circa 1965

Antique Carved Jadeite Sphere 25 mm, circa 1900

Antique Carved Jadeite Sphere 25 mm, circa 1900

Fancy Vivid Yellow Pear Shape Diamond and Diamonds Ring/Pendant

Fancy Vivid Yellow Pear Shape Diamond and Diamonds Ring/Pendant

3.09 Carat Unheated Mozambique Ruby Ring, set in 18kt WG with Diamonds

3.09 Carat Unheated Mozambique Ruby Ring, set in 18kt WG with Diamonds

Platinum Ruby and Diamond Bracelet

Platinum Ruby and Diamond Bracelet

Antique Cross by Robert Philips, circa 1880

Antique Cross by Robert Philips, circa 1880

Pigeon Blood 18kt Yellow Gold Ruby 3.02 cts  Ring, Cartier Paris

Pigeon Blood 18kt Yellow Gold Ruby 3.02 cts Ring, Cartier Paris

Platinum 7.63 cts. Emerald Step Cut Diamond Ring, circa 1930, Type IIa

Platinum 7.63 cts. Emerald Step Cut Diamond Ring, circa 1930, Type IIa

Aquamarine Pearshape and Diamond Earrings

Aquamarine Pearshape and Diamond Earrings

18kt Yellow Gold Diamonds Necklace, Van Cleef  & Arpels -  Paris

18kt Yellow Gold Diamonds Necklace, Van Cleef & Arpels - Paris

Platinum Art Deco Sapphire and Diamond Bracelet, circa 1930

Platinum Art Deco Sapphire and Diamond Bracelet, circa 1930

Carved Jade Diamond and Onyx Pendant, 18kt White Gold

Carved Jade Diamond and Onyx Pendant, 18kt White Gold

Platinum Art Deco Ruby and Diamond Bangle Bracelet, French, circa 1930

Platinum Art Deco Ruby and Diamond Bangle Bracelet, French, circa 1930

Platinum 2.29 Carat Radiant Cut Diamond Ring

Platinum 2.29 Carat Radiant Cut Diamond Ring

Platinum Diamonds Necklace

Platinum Diamonds Necklace

Platinum Diamond Cluster Earrings, circa 1965, New York

Platinum Diamond Cluster Earrings, circa 1965, New York

Platinum Ruby and Diamond Band Ring, New York, circa 1955

Platinum Ruby and Diamond Band Ring, New York, circa 1955

18kt Yellow and White Diamond Earrings, New York, Circa 1965

18kt Yellow and White Diamond Earrings, New York, Circa 1965

18kt Jadeite Ring, New York, circa 1960, 25.10 cts

18kt Jadeite Ring, New York, circa 1960, 25.10 cts

Kashmir Emerald Cut Sapphire 9.33 cts  - No treatment

Kashmir Emerald Cut Sapphire 9.33 cts - No treatment

Fancy Intense Purplish Pink Pear Shape 1.08 cts SI1

Fancy Intense Purplish Pink Pear Shape 1.08 cts SI1

Fancy Deep Orangery Pink VS1  1.25 cts

Fancy Deep Orangery Pink VS1 1.25 cts

Fancy Light Gray-Blue .45 cts

Fancy Light Gray-Blue .45 cts

Fancy Vivid  Yellow Pear Shape, VS1 Clarity 5.88 cts

Fancy Vivid Yellow Pear Shape, VS1 Clarity 5.88 cts

Kashmir -  Emerald cut Sapphire 3.12 cts AGL report

Kashmir - Emerald cut Sapphire 3.12 cts AGL report

Alexandrite 4.24 cts AGL Report

Alexandrite 4.24 cts AGL Report

Star Sapphire 23.49 cts - NTE Natural - no heat

Star Sapphire 23.49 cts - NTE Natural - no heat

Emerald cut Diamond 15.02 GIA D Color, VS1 Clarity

Emerald cut Diamond 15.02 GIA D Color, VS1 Clarity

Oscar Heyman Diamond and Ruby Feather Brooch

Oscar Heyman Diamond and Ruby Feather Brooch

Platinum Pearl and Diamond Brooch

Platinum Pearl and Diamond Brooch

Harry Winston Platinum Sapphire and Diamond Earrings, circa 1965

Harry Winston Platinum Sapphire and Diamond Earrings, circa 1965

Tiffany Art Deco Platinum Sapphire and Diamond Bracelet with French Cuts

Tiffany Art Deco Platinum Sapphire and Diamond Bracelet with French Cuts

Platinum Pearl and Diamond Bar Pin, circa 1910

Platinum Pearl and Diamond Bar Pin, circa 1910

Tiffany & Co. 14kt Jade and Ruby Brooch

Tiffany & Co. 14kt Jade and Ruby Brooch

French Platinum Carved Crystal Pearl and Diamond Pin

French Platinum Carved Crystal Pearl and Diamond Pin

Boucheron 18kt Art Deco Coral and Black Enamel Bracelet, Boucheron Paris, circa 1930

Boucheron 18kt Art Deco Coral and Black Enamel Bracelet, Boucheron Paris, circa 1930

Platinum Fancy Shape Diamond Drop Earrings

Platinum Fancy Shape Diamond Drop Earrings

Platinum Diamond Bird Brooch with Ruby accents, circa 1955

Platinum Diamond Bird Brooch with Ruby accents, circa 1955

Art Deco Platinum and Diamond Earrings

Art Deco Platinum and Diamond Earrings

18kt YG Ruby and Diamond Retro Bracelet

18kt YG Ruby and Diamond Retro Bracelet

Tiffany Art Deco Platinum Sapphire and Diamond Bracelet

Tiffany Art Deco Platinum Sapphire and Diamond Bracelet

Platinum Jade, Ruby and Diamond Brooch

Platinum Jade, Ruby and Diamond Brooch

Van Cleef & Arpels Platinum and Diamond Snowflake Bracelet

Van Cleef & Arpels Platinum and Diamond Snowflake Bracelet

Platinum Sapphire and Diamond Art Deco Bracelet

Platinum Sapphire and Diamond Art Deco Bracelet

Platinum Cabochon Emerald and Diamond Ring

Platinum Cabochon Emerald and Diamond Ring

Platinum Art Deco Emerald and  Diamond Earrings

Platinum Art Deco Emerald and Diamond Earrings

Harry Winston, Colombian Emerald 8.38 cts. No Treatment

Harry Winston, Colombian Emerald 8.38 cts. No Treatment

Platinum Ruby and  Diamond Flower Brooch

Platinum Ruby and Diamond Flower Brooch

18kt Yellow Gold Link Citrine Pendant Necklace, Poiray

18kt Yellow Gold Link Citrine Pendant Necklace, Poiray

H. Stern  Lace 18 Kt White Gold Diamonds Necklace

H. Stern Lace 18 Kt White Gold Diamonds Necklace

18 kt White Gold Diamonds Bracelet

18 kt White Gold Diamonds Bracelet

Platinum Fancy Diamond Cluster Earclips

Platinum Fancy Diamond Cluster Earclips

18 Kt Yellow Gold Spray Brooch, circa 1960

18 Kt Yellow Gold Spray Brooch, circa 1960's

18 Kt. Yellow Gold Diamond Earrings, circa 1965

18 Kt. Yellow Gold Diamond Earrings, circa 1965

Platinum Diamonds Drape Brooch, circa 1955

Platinum Diamonds Drape Brooch, circa 1955

Platinum Art Deco Emerald and Diamond  Bracelet

Platinum Art Deco Emerald and Diamond Bracelet

Platinum Jade and Diamonds Ring, circa 1965

Platinum Jade and Diamonds Ring, circa 1965

Platinum Ruby Line Bracelet

Platinum Ruby Line Bracelet

Platinum Edwardian Pinecone Diamond Earrings

Platinum Edwardian Pinecone Diamond Earrings

Verger Freres 18 Kt White Gold Art Deco Man

Verger Freres 18 Kt White Gold Art Deco Man's Travel Clock

Platinum 6.02 cts Burma Ruby Ring, heated

Platinum 6.02 cts Burma Ruby Ring, heated

Platinum Art Deco Diamond Double Clips Brooch, French

Platinum Art Deco Diamond Double Clips Brooch, French

18 Kt Gold Emerald Cut Diamonds Necklace, French

18 Kt Gold Emerald Cut Diamonds Necklace, French

Charming, Arts & Crafts Opal Diamonds & Enamel Pearl Pendant

Charming, Arts & Crafts Opal Diamonds & Enamel Pearl Pendant

18kt Yellow Gold Intense Yellow Diamond Ear Studs,  Winston

18kt Yellow Gold Intense Yellow Diamond Ear Studs, Winston

Platinum Diamond Necklace

Platinum Diamond Necklace

Van Cleef & Arpels Earrings

Van Cleef & Arpels Earrings

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