Diamond Education



Cut

When buying a diamond the diamond cut is the most important aspect as this is what determines the sparkler (fire) and the way the light reflects from diamond.

The cut is different for each of the shapes; the most popular diamond shape is the round brilliant diamond. There have been mathematical formulas to determine the cut grade and the GIA publishes what ratio there diamonds are classed in.

GIA has a cut chart which ranges from Excellent -Poor. Obviously the Excellent cut is the best.

Cut Grade

If you ask why is it so hard to cut a diamond well a round diamond has 58 cuts which if all cut in proportion will reflect the light and make your diamond sparkle from one side of the room to the other.

Carat Weight

Diamonds are measured in carats weight not size. The weight of a diamond or carat size has a substantial influence on the diamonds price. You will find that some diamonds don't have a good cut so that they can be classed as a higher carat weight.

The size of a diamond is sometimes determined by what piece of jewellery it will be used from. 0.75 - 1.00 are popular for earrings, 1.00ct -1.50 are popular for rings. Some times it’s better to get a smaller diamond with a better cut than a larger diamond with a poor cut.

Cut Grade

Clarity

Diamond Clarity is the measurement of tiny flaws that are microscopic imperfections which mean when viewed under a microscope you can see the natural flaws of the diamond. The main grades are :-

FL – Flawless
VVS1 and VVS2 Very Very Slightly included
VS1 and VS2, Very slightly included
SI1 and SI1 Slightly included

FL , IF Flawless or Internally Flawless - this means that there are no imperfections in the diamond this is very rare.

VVS1, VVS2- Very Very Slight - this means that it is difficult to see the flaws under a normal microscope.

VS1, VS2- Very Slight - this means that it is difficult to see the flaws under a normal microscope.

SI1, SI2 - Slightly - this means that flaw can be seen under a normal microscope.

Cut Grade

The size of a diamond is sometimes determined by what piece of jewellery it will be used from. 0.75 - 1.00 are popular for earrings, 1.00ct -1.50 are popular for rings. Some times it’s better to get a smaller diamond with a better cut than a larger diamond with a poor cut.

Colour

Gemmological Institute of America (GIA) was founded to give unbiased reports and certification of diamonds. They define and regulate the colour scale of diamonds. The Diamond colour chart starts with D and is considered to be colourless. The colour scale goes to z and from D-Z each letter starts to have a bit more coloured that the previous one.


Colour D, E and F are considered colourless and are very rare and with a very limited supply and demand premium prices.
To conclude the colour spectrum of diamonds starts at D and ends at Z. The most expensive 'white colourless diamonds' are D, E or F . G, H, I, J are considered near colourless and are difficult to detect any colour.

This colour chart show the diffrent grades which are availiable.


* Please note we only sell diamonds from grade D to J.

Certificate


Diamond Center only sells GIA and IGI approved diamonds. GIA stands for Gemmological Institute of America and was founded in 1931. It protects all purchasers by providing a full break down of what you are buying. Once a diamond is certified you can then compare the price with other retailers.
GIA is a non-profit organisation and its mission is to ensure the public trust into what you are buying.

IGI has offices around the world in Antwerp, New York, Hong Kong, Mumbai, Bangkok, Tokyo, Dubai, Tel Aviv, Cavalese, Toronto, Los Angeles, Kolkata, New Delhi, Thrissur, Surat, Chennai and Shanghai . The IGI School of Gemology operates from Antwerp, Mumbai, Dubai and Cavalese, offering a variety of courses designed for professionals and consumer enthusiasts alike.

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