• Register

Information for users from the old Q&A site
If you have an account from our old Q&A site, your account was transferred over, but you need to reset your password and confirm your email address.
Reset Password here
Confirm Email here

2,159 questions

3,776 answers


24,053 users

How many carats is a 7.0 mm round cut tanzanite ring?

0 votes
asked Jul 5, 2015 by nikkibear2011 (120 points)

1 Answer

0 votes
Carat measures the weight of a gemstone, and millimeters measure volume. They are not the same. Digital scales that measure carat weight are fairly inexpensive and can provide an accurate carat weight for any gemstone.
answered Jul 6, 2015 by hershel (51,320 points)