ENJOY Free shipping and free returns See Details

top

Carat Weight And Size

How are sapphires measured?

Gems vary in density, so a sapphire and a diamond of the same carat weight are visually different sizes. Because sapphires tend to be heavier, a one carat sapphire is generally slightly smaller in size than a one carat diamond. For ease of selection and setting, size is a more useful measurement, which we list in millimeters (mm). Our standard size for a round sapphire is 6 mm, which is approximately one carat.

Brilliant Earth carries a variety of shapes and sizes beyond our standard so if you are looking for something more unique, please contact us.

 

 
JOIN THEMOVEMENT

Share our story with others

know moreabout the issues
  • 7 Reasons to Choose Recycled Gold Jewelry
    7 Reasons to Choose Recycled Gold Jewelry

    Gold jewelry is a symbol of love and admiration, a precious possession with a high financial value and usually an even higher personal value... Read More

  • Zimbabwe Takes Control of its Diamond Mines
    Zimbabwe Takes Control of its Diamond Mines

    President Robert Mugabe of Zimbabwe complained recently that his country has been robbed of as much as $15 billion in diamonds , leading to a... Read More