Experts use four standard measurements to compare and evaluate diamonds: Cut, carat, clarity, and color. Once you get to know the four C's, you can make informed tradeoffs based on your style preference and budget.

Cut and Shape
Carat
Clarity
Color
Certification
Other Diamonds & Crystals
Maintenance


Cut and Shape

Diamond shapes range from traditional round cuts to hearts, pears, and more. Your choice should reflect the tastes of the person who will be wearing the jewel..


Round Brilliant Marquise Pear Heart Oval Emerald Princess



A well-cut diamond reflects light to maximize the stone's brilliance. Cut has three components:

Grade - A standard grading report describes the cut by the shape or outline of the diamond and the pattern of the facet arrangement (also known as cutting style).

Depth - How deep a stone is cut. A stone that is cut too shallow or too deep loses light through the bottom or sides of the diamond causing the stone to sparkle less.

Polish - A poor polish, or rough facets, can diminish the stone's brilliance, as well as its value.



Image source: International Gemological Institute


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Carat

Diamond size is measured by weight in carats or points. Because larger diamonds are rare, prices rise considerably as carat weights increase. If your primary shopping concern is high carat weight, a moderate downgrade in carat size (e.g. 0.05) can save you a lot of money and still look beautiful.

1 Carat = 100 Points = 200 milligrams