Diamond Carats

A carat is a unit of measurement and it’s the unit used to weigh a diamond. One carat is equal to 200 milligrams, or 0.2 grams.

The word “carat” is taken from the carob seeds that people once used to balance scales.

NOTE: “Karat” is a different word that is used to describe he purity of gold.

Large diamonds have a greater cost per carat and the price of a diamond rises exponentionaly to its size (e.g., a 2-carat diamond will cost more per carat than a 1-carat diamond of equal grade).

Diamond Size Comparison Chart

For a a printable diamond size comparison chart that displays rings on the hand, visit our Diamond Size Chart page.

What Size Diamond Should I Buy?

  • Determine your budget. You will hear various guidelines such as “the engagement ring should cost 2-3 months salary”, but a better consideration is what can be afforded. There’s no reason couples should start a life together with an uncomfortable amount of debt.
  • In 2013, couples spent an average of $5,403 USD on an engagement ring. Also in 2013, the average size of the center stone was 1.1 carats.
  • Deciding on carat size is really about striking a balance between size, quality, affordability, and personal preference. If she prefers larger jewelry items, and you are working within a budget, you can still find a larger diamond of excellent quality gem by selecting one which is graded slightly lower in terms of color and clarity.
  • Remember that slender fingers make small diamonds look bigger. If she has small fingers, a 1-carat diamond will look proportionately large — and an even larger stone may appear stunningly big!
  • To get an idea about diamond sizes, download our Diamond Size Chart which shows nine different sizes of diamond from .25 carat through 5 carats.

Read more about the Four Cs of Diamonds

Diamond Education
4Cs of Diamond Grading | Diamond Cut | Diamond Clarity | Diamond Color | Carat Weight | Diamond Certificates | Diamond Size Chart | Diamond Fluorescence | Diamond Ring Settings | Diamond Glossary

Diamond Shapes
General Shapes Information | Asscher Cut Diamonds | Cushion Cut Diamonds | Emerald Cut Diamonds | Heart Shaped Diamonds | Marquise Cut Diamonds | Oval Diamonds | Pear Shaped Diamonds | Princess Cut Diamonds | Radiant Cut Diamonds | Round Brilliant Diamonds

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