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The 4Cs

Diamond Carat — Weight & Spread

Points, decimal carats, “magic weights,” face-up measurements, and value beyond the headline number.

Carat denotes weight—not visual span. Two Excellent-cut rounds at 1.00 ct can diverge noticeably in perceived size if girdles differ.

Face-up diameter cheat sheet — rounds

Approx. diameterRepresentative ct
6.5 mm±1.00 ct
6.9 mm±1.25 ct
7.7 mm±2.00 ct
0.50 ct
1.00 ct
2.00 ct
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