275 Post Street #600B
San Francisco, CA 94108


Achieve the maximum price when you sell loose diamonds in San Francisco by consulting with our GIA trained experts.


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Bay Area Diamond Buyers

Achieve maximum price for your diamonds by consulting with our GIA trained experts and Bay Area diamond buyers. We will share our 35 years of experience and knowledge with you at no cost. We have paid fair market value for thousands of diamonds we have purchased in the past and we guarantee the same to you. Secure payments are made immediately.  

We can help you sell your diamond engagement ring! We have been Bay Area diamond buyers for over a quarter of a century. We have the knowledge and expertise to evaluate your valuables and offer the best prices when you sell loose diamonds in San Francisco! We offer the most cash for your diamond, fine jewelry and engagement rings. Call 1(800) 424-GEMS (4367) for an appointment, a phone consultation or a free appraisal. Our expertise as diamond buyers and jewelry buyers means more cash for you when trying to sell your jewelry in San Francisco. Union Square Diamond Buyers offers a process that is fast, discreet and safe. Our showroom is conveniently located in the heart of Union Square, close to parking, BART and all major banks. Come in and sell your jewelry to an established and well-known Bay Area diamond buyer. Selling loose diamonds in San Francisco to a trusted and established business will give you the highest payout.

We pride ourselves on our A+ rating from the Better Business Bureau and are proud to be affiliated with the Gemological Institute of America, Jeweler’s Vigilance Committee, Jewelers of America and Kimberley Process. Our on-site GIA trained gemologists in Union Square will help you get the most cash for your fine jewelry. With over fifty years combined experience in the San Francisco diamond and fine jewelry market, we will offer you the most value for your fine jewelry, watches, engagement rings, and estate pieces. Please contact us for a free appraisal at 1-800-424-GEMS.



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