Carat refers to the weight of the laboratory grown diamonds. One metric carat equals 200 mg. A total of 100 cents equals one carat.
Diamond weights below one carat are referred to by their cents alone. A 0.50 cents diamond can also be referred to as half a carat.
If the engineered diamonds weight is more than a carat, then both the carats and cents should be mentioned. A 1.05 cents diamond is referred to as 1 carat 5 cents.
The more the carat weight, the costlier the gem. But you can choose a laboratory diamonds that is slightly below the whole carat weight to obtain a less expensive stone. For example, choose a 0.99 carat stone over a one carat diamond to save money on your diamond buy. The 0.99 carat stone shall be cheaper and be sized similarly to that of a 1 carat stone.