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Diamond Price Calculator™


Calculate The High Wholesale Value Before You Buy Or Sell A Diamond

Sometimes you need a few tools to set your expectations before you set foot into a store. We invite you to use our Diamond Price Calculator, it's an excellent tool to approximate the high wholesale price or value of a loose diamond in US dollars.

This calculator works as a guideline of value for most diamonds. It is not an indication of our purchase or sale price. We are very competitive in our valuations, but many factors go into pricing specific diamonds. This original Diamond Price Calculator™️ has been relied upon by millions across the world since 2005. Learn More...

Discover the Four C's of Diamonds

Carat • Color • Clarity • Cut


Carat is the most well-known of the Four C's and refers to the diamond's weight. One carat is equivalent to 200 milligrams. The carat weight has a direct impact on a diamond's size and, to some extent, its price. Larger diamonds are generally more valuable, but the other C's also greatly affect a diamond's quality. It's important to note that two diamonds of the same carat weight can differ significantly in terms of overall value based on their color, clarity, and cut.

Compare Diamond Carat Weight


Diamonds come in a range of colors, but the less color a diamond exhibits, the more valuable it typically is. The Gemological Institute of America (GIA) grades diamond color on a scale from D (colorless) to Z (light yellow or brown). Truly colorless diamonds are rare and highly prized. The presence of even subtle color can significantly affect a diamond's appearance and value. The choice of diamond color often depends on personal preference, but it's important to consider the setting and metal color as they can influence the perception of a diamond's hue.

Discover Diamond Color


Clarity measures the presence of internal and external imperfections, known as inclusions and blemishes, in a diamond. These natural features formed during the diamond's creation process and are like the diamond's unique birthmarks. The GIA provides clarity grades from Flawless (no inclusions or blemishes visible under 10x magnification) to Included (inclusions and/or blemishes visible to the naked eye). Diamonds with higher clarity grades are rarer and more valuable. However, many inclusions are microscopic and do not impact a diamond's beauty.

Discover Diamond Clarity


The cut is perhaps the most critical of the Four C's as it directly affects a diamond's sparkle and overall visual appeal. A well-cut diamond will reflect light in a way that maximizes its brilliance, fire, and scintillation. The GIA grades diamond cut from Excellent to Poor, taking into account factors like proportions, symmetry, and polish. A well-cut diamond can make a smaller carat diamond appear larger and more dazzling than a larger one with a poor cut.


At Washington Diamond, we recognize the immense importance of providing our customers with certified diamonds. A diamond lab report certification is a document that offers a comprehensive analysis of a diamond's characteristics based on the Four C's: Carat, Color, Clarity, and Cut, along with other essential information.

These certifications are generated by independent gemological laboratories, such as the Gemological Institute of America (GIA) or the International Gemological Institute (IGI), which are renowned for their expertise and impartiality.

Washington Diamond is committed to ensuring that every customer receives a diamond with a valid and reputable certification. This certification not only verifies the diamond's characteristics but also assures its authenticity and provenance. With a certified diamond, you can trust that you are investing in a high-quality gem that lives up to the specifications stated by our experts.

By offering these detailed reports, we empower our customers to make educated choices and select a diamond that aligns with their preferences, budget, and peace of mind.