Carat

This GIA Certificate lists pertinent information, including carat weight, shape and cutting style, measurements, phenomena, etc.
Photo courtesy of Scott Papper, GIA GG, AJP, Global Gemology & Appraisals
Carats are units used to measure the weight of diamonds and other gemstones.

1 carat = 1.00 ct.
1/2 carat = 0.50 ct.
1/4 carat = 0.25 ct.
5 1/2 carats = 5.50 cts.

1 gram = 5 carats