Diamond Clarity Scale
Tiffany Diamond Experts 800 518 5555
As this chart demonstrates, diamond clarity ratings range from FL (flawless)
to I3 (heavily included).
Gem-grade diamonds are given a clarity rating based on a scale that is
standard in the trade. However, when Tiffany believes that a diamond’s
clarity is on the borderline between two grades, Tiffany will always
give the stone the lower grade.
internally flawless—minor surface blemishes
very, very slightly included
very slightly included
Tiffany gemological standards refer only to
round brilliant diamonds from .18 to 2.99
carats set in certain ring styles. Round brilliant
diamonds smaller or larger, fancy shape
diamonds and fancy color diamonds each have
their own specially tailored standards
of evaluation. Consult your Tiffany Sales
Professional for details.