A Look at the Guinea Star Diamond

The Koh-I-Noor came out of India, The Cullinan stones from Africa, and various others from different nations on the globe. The Guinea Star is a worthy addition to that list. Hailing from the Republic of Guinea, it possesses the highest color grading assigned to white diamonds, as well as an Internally Flawless composition.

Cut in the exceptionally rare shield shape, this stone carries some very rare characteristics that make it worth knowing about, if not admiring in person. Weighing 89.01 carats, it easily outdoes the stones on most white diamonds rings sold on the market. The Guinea Star is a Type IIa stone, which means it carries no impurities that could impart color to it. The chemical purity is not the only thing of note though; this diamond is also structurally perfect, placing it in a group that makes up just 1% of all diamonds ever mined or otherwise discovered.

The shield cut carries seven sides, which is two more than what the five-sided kite-shaped cut has. Two of these are on either side of the shield and are the longest sides.