Win a 0,20 carat diamond ring*

Wich particular cut increase the brightness of a diamond ?

(indice) Ideal Cut Ideal Brightness Ideal Diamond

What is the exact name of the official certificate, securing the extreme purity of a "Coeurs & Flèches" diamonds ?

(indice) Brightness card Purity card

*A "Princess" ring - in pink, yellow or white gold - to win if you have the correct answers

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