275 Post Street #600B
San Francisco, CA 94108


We can provide one of the easiest processes to ensure you get the best price for your engagement ring or fine jewelry.

Union Square Diamond Buyers: An established and trusted business for over 35 years!People sell to us because we pay more for your diamonds and fine jewelry.We have processed over $100 million in transactions.

Union Square Diamond Buyers has been in the diamond business for over 35 years. We offer immediate payments. No diamond is too large; we accept diamonds with or without certification.FF

For over 35 years, we have been an established and successful fine jewelry store in downtown San Francisco. As a well-stocked jewelry store, our expertise and specialty has been diamonds. We have bought and sold very large quantity of high quality diamonds over the years and therefore our knowledge and expertise will maximize your payout. A trusted jeweler is the partner you want to turn to when it comes to selling your diamond or fine jewelry. Our vast experience as diamond buyers can help you when it comes to selling your jewelry, luxury watch or diamond. Our GIA graduate gemologists are here to help you determine the value of your jewelry.

Union Square Diamond Buyers was not created just to take advantage of today’s high gold prices and close the door as soon as the rush is over. We are here to provide yet another service to our customers when their jewelry is no longer satisfying their needs.

We are an established business that is well known in the Bay Area as in the U.S. and internationally. We are accredited with following organizations:

  • Member of  the BBB (Better Business Bureau), A+ rating and complaint free.
  • Member of the JVC (Jewelers Vigilance Committee) , which makes sure we work with the highest standards in the jewelry industry.
  • Member of Jewelers of America, which stands for professional practices and ethical business practices.
  •  GIA Alumni, which stands for the world’s highest diamond education.
  • Secondhand Dealer/Pawnbroker License # 3801-1606

We value our customer and their privacy. Our services are discreet and guaranteed confidential. If you are searching for a company you can trust, feel free to contact us now and we will help you sell your jewelry. Call us today at 1(800)424-4367 (GEMS) to schedule an appointment with one of our experts!

Jewelers of America Logo
National Association of Jewelry Appraisers Logo
ASA Logo
Better Business Bureau A+ Rating
Jewelers Vigilance Committee Logo
GIA logo
Kimberley Process Logo



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