Union Square Diamond Buyers

Diamond buyers in the heart of San Francisco, on Union Square!


Do not mistake Diamond Buyers ins San Francisco for a pawn shop. We are not in the business of giving you the least amount of money possible in an effort to obtain unfair and inflated profits. We actually have out-of-towners come in from all of the Bay Area and beyond, because some diamond buyers in San Francisco engage in this practice. This is also the reason why we are the diamond buyer of the are residents trust. We value your diamonds based on very strict guidelines, and we ensure that you get a fair market price after this evaluation.

There are several factors that we use to value your diamonds, and any professional company should do the same. Trustworthy diamond buyers pay fair value based on cut, carat, clarity, color and a few minor details as well. We have been established diamond buyers in San Francisco since 1985 and also have GIA trained gemologists on staff, that have the experience to truly evaluate all aspects of diamonds and also know the diamond market very well to maximize your outcome, when trying to sell your diamond.


The cut of a diamond is the only characteristic of the four Cs (cut, clarity, color and carat) that is influenced by humans. The diamonds that you buy don’t naturally come out of the ground as beautiful as they appear. Most diamonds naturally look like glass pebbles, so humans have to cut the diamonds to achieve maximum beauty. The cut influences how brilliant a diamond appears. We do analyze cutting through and expensive machine, that gives us cut grade through GIA standards.


Diamonds take time to form, and unfortunately, this allows particles of other material to develop within the diamond. The diamonds  that we look at vary incredibly in these terms. Some diamonds are absolutely flawless, and others have minor imperfections. Our GIA trained gemologists are very experienced in evaluating clarity and can show you other GIA graded masterstones to determine the exact clarity.


A carat (ct) is the actual weight of the diamond. Small differences in carat size can cause a huge variation in what a diamond is worth. A diamond that weighs only .10 ct more than a similar diamond could net you more than fifteen percent in increased profit. But we also measure the weight in front of you or under camera supervision, for you to see the exact ct weight.


There are white diamonds and colored diamonds, and they are graded in different ways. A white diamond is worth more when it has very little color within it. Colored diamonds, however, gain value as the intensity of their color increases. Several natural processes can cause the creation of these colored diamonds. We also compare your stone, to masterstone GIA diamonds to determine the color.

Other Factors

There are some other factors involved in diamond grading that have a much smaller effect on their value than the four Cs. Two of these factors include polish and symmetry. Of course, the more beautiful a diamond is when it comes to these two characteristics the better, but diamond buyers in California are usually more worried about cut, clarity, color and carat. We take into aspect all of the factors and therefore can give you the maximum pay out possible.


Please call us at 1-800-424-GEMS or fill out one of our forms at www.diamonds4cashsf.com to contact the best diamond buyers in San Francisco and online.