Diamond guides

Know your diamond

Clear, practical guides to the 4Cs, shapes, certification and sizing, for the trade and the clients you serve.

The 4Cs of diamonds

Cut, colour, clarity and carat, and how each one drives a diamond’s look and value.

Round, oval, emerald, pear and more, and the character of each cut.

What a GIA or IGI report certifies and how to read one.

Origin, rarity, certification and value, and where Kiran stands.

How to measure accurately, plus US, UK and European size conversions.