A laboratory diamond of one carat and 50 minutes.
The main differences between a 1-carat lab-grown diamond and a 0.5-carat (50 points) lab-grown diamond are size, price, and visual impact: 1. **Size**: 1 carat equals 100 points, so a 1-carat diamond is twice the size of a 0.5-carat (50 points) diamond. A 50-point diamond weighs 0.5 carats. 2