ENJOY Free shipping and free returns See Details

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
  • Jewelry Industry Should Invest in Diamond Diggers, NGO Leader Says

    Jewelry Industry Should Invest in Diamond Diggers, NGO Leader Says

    There are about a million artisanal diamond diggers in Africa who live in extreme poverty. For the last century they’ve been mostly forgotten, left... Read More

  • Brilliant Earth Purchases Will Help Fight Ebola

    Brilliant Earth Purchases Will Help Fight Ebola

    Every day, it’s becoming clearer that the Ebola outbreak in West Africa needs a much stronger global response. Brilliant Earth wants to help. Today... Read More