Live Spot Pricing 24 Hours A Day


When it comes to the quality of your gemstones, you want a professional that pays attention to every detail.

With over 30 years of experience assessing diamonds and gemstones, our GIA certified graduate gemologists have seen it all!

Feel free to bring in any size diamond, emerald, ruby, sapphire, or other gemstones. You’ll see our attention to detail is incomparable, and our knowledge of the gemstone market allows U.S. Coins & Jewelry to get you the most cash for your stones.

Precious Gemstones

Understanding Gemstones

Gemstones such as rubies, sapphires, and emeralds are naturally occurring mineral crystals that have been cut and then polished.

Since ancient times, gemstones and the jewelry they adorn have been a part of human society. Throughout history, gemstones and jewelry have been used for signifying wealth and status. Today, global urbanization means that the popularity of gemstones continues to increase. With the emergence of wealthy middle classes in rapidly growing economies, there is a huge demand for gemstones, but regulation has struggled to keep up with this demand. As a result, the sale of fraudulent and fake gemstones has skyrocketed, and there is a need for an effective and fast way of determining authenticity. Our team is trained to evaluate stones.

How are Gemstones Identified?

Gemologists make use of tools including jeweler’s microscopes, loupes, or measurement of the refractive index in order to identify synthetic gemstones or those that have been improved.

A jeweler’s loupe is a magnifying device that allows inclusions and blemishes to be seen. Microscopes offer further magnification and can be employed for detecting heat treatments and various other clarity enhancements.

However, these techniques all need a trained gemologist to perform the analysis, and the decision always includes human error. Furthermore, synthetic gems and enhancements are becoming immensely sophisticated, making standard methods unreliable. As a result, sophisticated methods of gemstone analysis, which are borrowed from analytical chemistry, are indeed becoming popular.

The price of gems relies on their identity, color, clarity, weight (carat), size, origin, shape, treatments, cut, and polish. Some of the rarest gemstones, such as the red diamond, are capable of fetching up to $1 million per carat.

Considering Selling Your Diamonds, Rubies, Sapphires, and Emeralds?

We are Houston’s most trusted source and will match or beat any reasonable offer. Just bring it in, and we will be happy to get you a free appraisal.

Call us at (713) 597-6367 or visit our retail store.

We buy all large GIA Diamonds and Gemstones including Rubies, Sapphires, and Emeralds.

Call us today at (713) 597-6367 or fill out the form for a free quote.

How much should you ask for your item?

If you do not know how much money you should be asking for your item, you should get a fair market value appraisal from a trusted appraisal company. U.S. Coins and Jewelry offers free no-obligation appraisals. A trained appraiser will take into consideration the various factors that go into pricing: the quality of the gemstones or the jewelry, availability on the market, and desirability for that particular stone or piece of jewelry in your area.

Fair market value will give you a baseline price, to help you decide how much to ask for the stone or jewelry piece.


Images must be below 10MB

For best results, upload PNG, JPEG or TIFF files under 4MB

Helpful tips for selling a gemstone or jewelry

Whether it’s a piece of heirloom diamond jewelry or a loose colored gemstone found in the bottom of your jewelry box, these commonly asked questions will help you sell your gemstones or jewelry with ease.

Are there such things as GIA-certified appraisers?

GIA does not certify appraisers. GIA teaches students how to identify gemstones and grade diamonds, but they do not teach them how to write appraisals. An appraisal is a legal document, and an appraiser should have specialized training in this area. At U.S. Coins and Jewelry, we have appraisers on staff who will carefully examine the condition and quality of your gemstone. Our company has been buying and selling gemstones for over 30 years, and we have generations of happy customers who received great value for their gemstone and a great experience.

What do I do after the appraisal?

After you have your appraisal completed, talk to the appraiser about their interest in purchasing your item. Many gemstone buyers buy low and sell it cheaper because they want to churn through as many transactions as possible.

At U.S. Coins and Jewelry, we deliver one-on-one customer service, and we want to build an inventory of quality gemstones to sell to our customers. That means we can pay much more than a typical “Cash for Gemstones” operation.


Diamonds & Jewelry
Getting An Appraisal For Estate Assets When a loved one passes, the burden of valuing the estate assets rests on the shoulders of the family involved. While processing through the grief of losing a loved one, some may be tasked with assessing the inheritable items. This may include valuable coins collections, estate jewelry, and other various metals, jewels or gemstones. The heirs to the estate may have difficulty accurately eval
Diamonds & Jewelry
4 Tips For Selling Your Diamond Or Estate Jewelry To help unravel the mysteries of diamond selling, here are four tips to consider before selling your stone. 1. Know what you’ve got Just because your grandmother said her diamond ring was valuable doesn’t make it an actual fact. It may not even make it a diamond. So, before you rush to market, get an accurate picture of its quality and authenticity. A qualified appraiser can give you
Diamonds & Jewelry
Get More For Your Diamonds When You Sell Smart Retailers are not in business to buy back diamonds, so when it comes time to sell, they offer you much lower than the retail price tag. Pawnshop offers will likely be even lower. Selling your valuable jewelry can give you a major headache. There’s a myriad of difficult questions such as “Who buys diamond rings near me?” and “Will I get a fair price for my jewelry?” A
Diamonds & Jewelry
Selling Your Engagement Ring After Divorce Deciding to sell an engagement ring during or after a divorce has a number of financial and emotional benefits. But what is the best way to sell an engagement ring? How quickly will you get paid? Who will give you the best price? How to Sell Your Engagement Ring When looking to sell your wedding ring, you have a multitude of options including jewelers, auction houses, pawnbrokers, and onlin



We share educational articles, specials, and general updates. Be the first to be in the know. 

US Coins hosted my son's BSA Scout Troop to help them work towards earning their Coin Collecting merit badge. They were very helpful and willing to answer all of the questions that they had. My son wanted to get as much written down on his worksheet as possible before leaving, and Ms. Johns was kind enough to sit down with him and go through the remaining requirements that did not involve actually building a collection. A lot of us parents looked at buying US Mint Proof Sets for our Scouts, and their prices were very good. Thank you to US Coins for being great community members!
Andrew Wong