Diamond & Gemstone Analysis - U.S. Coins and Jewelry
U.S. Coins

Diamond & Gemstone Analysis

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.

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.
Why people trust U.S. Coins and Jewelry:
We're proud to be the most trusted gold and silver buyer in the Houston, Texas area.

Looking for a local trustworthy buyer to sell your valuables? We buy far more than just gold, silver, diamonds, and Rolex watches.

We also buy scrap gold, platinum, palladium, and other precious metals, coins, coin collections, diamonds and gemstones, jewelry of all types, luxury watches, historical documents, fine art and memorabilia including sports memorabilia, comic books, and select other collectibles.

U.S. Coins and Jewelry offers the highest payout for your bullion, coins, diamonds, jewelry and more.

Our verbal appraisals are free. You are under no obligation to sell your collection to us. We value the opportunity to view your collection and help you put a value on your items.

SELL US something from your collection




Absolutely phenomenal communication and service!! Kenny and the team are absolute rock stars!! Many more purchases to come in the future!!! Highly recommend.
- Gus Aslanidis
U.S. Coins and Jewelry has been my go to for buying and selling coins, silver and gold for years. My most recent experience was quick and easy. The staff are friendly and helpful. They really take the fear and uncertainty out of investing in precious metals and coins, and their exchange fees are very reasonable.
- Stephen Peterson
They are the best at helping you build a rare coin collection, bullion sales, & jewelry. I always recommend my friends & family go there. I'm a long time customer from 2011 to date. They have access to some of the finest rare coins out there.
- Robert Dean
Came in just to browse walked out with an engagement ring and got a solid deal! Highly recommend place for all your needs. Have been coming for years Anthony was a great help thanks again!
- Daniel Nino
I walked into this place for the first time and was wonderfully greeted by some very friendly associates. This shop is a treat and seeing all the great things it had to offer was amazing. From comic books to coins to even art and watches this shop has it all. I will most definitely be coming back and they offer great deals on buy backs. What a time to be invested in precious metals!
- Muhammad Hamdan
They were very professional, personable and efficient. They trusted - without seeing the actual paper - the quote I received elsewhere for a Rolex watch. They didn't meet it - THEY BEAT IT! Very nice, safe place to do business.
- Monica W
Before going to U.S. Coins, I went to another location much closer to me and the price they gave me did not seem right. So I went to U.S. Coins and they more than double the buy. After speaking to the person I dealt with I decided to only sell my deceased wife's necklace and they still gave me much more than I would have gotten from the other dealer. U.S. Coins were polite and very easy to deal with.
- Tommy Clements
Great bunch of guys, very knowledgeable and honest and always ready to help and make a deal. Always great prices on coins and bullion. Leave smiling every time knowing I got a great deal. Thanks guys y'all are great!
- Larry Brooks

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