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diamond grading and sourcing

Every diamond is unique. Yet all diamonds share certain features that allow us to compare and evaluate them. These features are called the 4Cs. The beauty of a diamond is determined by all four. Lesser diamonds and industrial quality diamonds are often cut so people can get a bigger size but lack the whiteness and fire of better quality stones.

Parchment Jewellers believes that when making such an important purchase as a diamond the customer should receive the brightest, clearest and most sparkling stone, whose quality will never fade.

Colour - The Diamond Colour Scale extends from D (colourless) to Z (light yellow or brown). Gem quality stones are those that have a colour rating from D to G.

Clarity - The Diamond Clarity Scale includes eleven clarity grades ranging from Flawless to I3. Gem quality stones are those that are VS and above.

Cut - A polished diamond’s beauty lies in its complex relationship with light, which produces a combination of fire (flash of rainbow colours from within) and brilliance (the burst of sparkling light). It is the cut of the diamond that determines this.

Carat Weight - One carat equals 200 milligrams in weight. For diamonds under one carat, each carat is divided into 100 points – similar to pennies in a pound. 0.75 ct. = 75 points, 1/2 ct. = 50 points.

For more details on diamond grading, please click here.

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Parchment Jewellers can be found in the heart of Winchester on the boutique, Parchment Street.
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