Carat weight: 0.91 ct.
Diamond carat weight is the measurement of how much a diamond weighs.
A metric "carat" is defined as 200 milligrams.
your diamond 0.91ct.
0.86 Carat Round Loose Diamond, D, SI1Good, GIA Certified
0.86 Carat Round Loose Diamond, E, SI1Excellent, GIA Certified