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.

Full payment is required for all unknown accounts prior to shipping items