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What We Buy

We purchase natural diamonds of any cut, color, clarity and carat weight. Diamonds can be loose or mounted stones. We have graduate gemologists and accredited jewelry professionals on staff who will grade and identify your stone. We are equipped with the proper tools necessary for testing a diamond's authenticity, measurements and characteristics. The four characteristics of diamonds we examine are the cut, color, clarity and carat weight.


When you hear the term “cut” when referring to a diamond, most people are thinking of the shape. However, cut actually refers to the symmetry and polish of a diamond. These factors have to do with how the facets interact with light to give it that sparkle!  There are five cut grades: Excellent (EX), Very Good (VG), Good (G), Fair (F) and Poor (P).


The color scale goes from D-Z. D meaning completely colorless which is the rarest and most valuable while Z is typically not something that would be used in jewelry. Deciphering color is a trained skill that cannot be determined by the untrained eye.


Clarity measures the transparency of the stone. Things that factor into this are inclusions and imperfections. There are 6 categories for grading clarity; Flawless (FL), Internally Flawless (IF), Very Very Slightly Included (VVS1 & VVS2), Very Slightly Included (VS1 & VS2), Slightly Included (SI1 & SI2) and Included (I1, I2 & I3).

Carat Weight

Carat is a unit of weight, rather than size. 1 carat weighs roughly the same as a single paperclip. More carats doesn’t mean a better diamond, simply because you have to take into account the other four characteristics.

Noteworthy Past Purchase

One of our estate specialists, Brandon, had a customer at MJ Christensen Diamonds with a 7 carat round brilliant cut diamond. The diamond was set in a brooch that had belonged to her aunt. When her aunt passed away, our customer inherited this brooch and assumed the diamond was fake. Brandon noticed the brooch hidden in a bag of costume jewelry. After evaluating the gemstone, Brandon was able to properly grade the diamond and offer the customer an amount of money that almost made her fall over!

Sell Your Diamonds

How to Sell an Engagement Ring With Success

How to Sell an Engagement Ring With Success

If you have an engagement ring you no longer need, selling it through National Rarities provides the most financial flexibility. Through our commitment to customer satisfaction, multiple selling options and top-dollar offers, we’ll ensure that you receive the best possible price for your precious piece. Discover invaluable insights into selecting a trustworthy buyer and our seamless process that prioritizes you.

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Best Place to Sell Watches Online

Do you have a watch collection you haven’t touched in years? Or perhaps you recently inherited a valuable timepiece and want to find the right buyer. If you’re looking to sell watches online for cash, you’ve come to the right place! Since 2009, National Rarities has been the premier online marketplace for selling watches. From having expertise in the industry to our vast network of collectors and enthusiasts, explore why we have the most trustworthy online platform for selling your treasured timepieces.
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How to Sell Junk Silver

Do you have silver jewelry, coins or flatware collecting dust? If so, it may be time to turn your unwanted valuables into cash! Whether you’re looking for a trustworthy online option or a selling event near you, National Rarities makes the process simple, easy and hassle-free. Plus, we stay up-to-date with the latest market prices, maximizing your return on investment. Here's a breakdown of how to sell junk silver the right way.
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