POPSUGAR: We’ve all heard of the four C's, but not everyone knows what the mean. Could you explain the basics?
Cassandra Mamone: The four C’s refers to the diamonds characteristics which are the cut, colour, clarity and carat.
Cut: While diamonds come in different shapes (like round, pear, etc.) the term “cut” actually refers to the diamond's proportion. A diamond's cut determines its light reflection — its sparkle factor. When a diamond is cut to the right proportion —- neither too deep nor too shallow — the light will reflect inside the stone from one mirror-like facet to another and reappear through the top, making it sparkle from within.
Colour: Grades D, E, and F are the rarest and so the most valuable on a scale that goes to Z (and yellowish). Usually about one in two people in a blind test can tell the difference between a D and an H coloured diamond; at I and lower, the majority of people can see the faint tint of yellow.
Clarity: Nearly all diamonds contain tiny marks known as inclusions which make each stone unique, like a birthmark. Diamonds with no inclusions are categorised either as flawless (FL) or internally flawless (IF) — and are costly. The inclusions don't necessarily weaken the stone and, as long as they don't interfere with the passage of light, they won't affect its beauty either.
Carat: A diamond's size is measured in carat weight, and one carat is equal to 0.20 of a gram (or one-fifth). Each carat is divided into 100 points, so a diamond of 50 points weighs 0.50 carats.
Pictured: Platinum and pear cut diamond ring, price on request, Fairfax & Roberts, stockists: (02) 9232 8510