Deep within the belly of the earth, majestic powers of nature work together to create a gemstone that has always fascinated man, not merely for its brilliance, but also for its hardness and strength. However, until the mid-1900s, there was no "agreed-upon standard by which diamonds could be judged".
The GIA was the first to standardise the assessment and description of diamonds according to Colour, Clarity, Cut and Carat. These are popularly known as the 4 Cs. Today, the Gemological Institute of America's 4 Cs of Diamond Quality is the universal yardstick of measuring the quality of any diamond, anywhere in the world. This means that diamond quality can be expressed in a universal language and customers know exactly what they are buying. No other system has the clarity and universal acceptance as the GIA scale.
The Gemological Institute of America suggests that you “choose your jeweller as you would choose a doctor.” At Mehta, we go a step further. We will tell you about The Fifth C too.
“Diamond colour actually means lack of colour.” - Gemological Institute of America
When we speak of diamond colour, we are actually referring to the absence of colour. A diamond that is ‘chemically pure and structurally perfect’ is colourless, like a drop of pure water. Hence the expression, ‘a diamond of the first water’.
GIA’s colour-grading system spans a range from D to Z, with the letter D standing for colourlessness and proceeding with increasing colour to the letter Z. It follows, therefore, that all other factors being the same, a diamond of G colour would be better than one of H colour. Many of the colour distinctions are very subtle and can only be assessed by a trained eye.
When determining diamond clarity, an expert considers several factors such as number, size, relief, nature, and position of these inclusions and any external marks. He also considers how these affect the overall appearance of the diamond. While no diamond is perfectly pure, the closer it comes to being free of blemishes and inclusions, the higher its value.
Many inclusions and blemishes can only be seen by a trained diamond grader under 10x magnification. To the naked eye, a VS1 and an SI2 diamond may look exactly the same, but these diamonds are quite different in terms of clarity. For this reason, your safest bet is to buy from a jeweller whose expert and accurate assessment you can trust. “A diamond’s cut brings out its shine.” - Gemological Institute of America “Diamond carat weight is the measurement of how much a diamond weighs. A metric ‘carat' is defined as 200 milligrams.” - Gemological Institute of America At Mehta, we consider this 5th C as vital as Colour, Clarity, Cut and Carat Weight.
- are often obvious to the naked eye.
Rough diamonds look like pale gravel or sand. In order to bring out the true brilliance of the diamond, the rough stone has to be cut so well that its facets are able to reflect light and enhance its brightness, fire and scintillation:
Brightness refers to the internal and external white light that gets reflected from the diamond.
When we speak of the fire in a diamond, we mean the scattering of white light into all the colours of the rainbow.
A diamond's scintillation is the amount of sparkle a diamond produces, and the pattern of light and dark areas caused by reflections within the stone.
The GIA uses a five-grade scale from Excellent to Poor to categorise diamonds according to how well they are cut.
Each carat is made up of 100 points. In the case of a diamond that is less than one full carat, we describe it only in points or cents. A diamond that is one-tenths of a carat is referred to as being 10 cents or called a 10-pointer. Diamonds over 100 cents are referred to in carats and decimals, as in 1.08 cts, 2.15 cts, and so on.
To the naked eye, there is no visible difference between a diamond that is 99 cents and one which is 1.00 cts. However, the former would cost quite a bit less than the latter. Two diamonds of equal weight can cost different amounts based on all the other factors of colour, clarity and cut. All other factors being equal - cut, clarity and colour - it follows that a larger stone will cost much more than a smaller one.
The 5th C - Confidence in your jeweller
When you buy diamond jewellery, how do you know the quality of the piece you have chosen?
It takes the trained eye of an expert in grading and selection to sort diamonds according to the 4 Cs. Customers take the jeweller's word for the quality of the diamonds and gemstones they buy.
At Mehta, we have always stressed on our commitment to ensuring that our customers get the best value for their money and that it is our privilege to serve them. Each and every diamond at Mehta Jewellery is carefully hand-picked by GIA-trained experts. Every piece of diamond jewellery comes with a signed guarantee card that states the details of the diamonds in your purchase. So you can safely you place your confidence in Mehta diamonds.
Many inclusions and blemishes can only be seen by a trained diamond grader under 10x magnification. To the naked eye, a VS1 and an SI2 diamond may look exactly the same, but these diamonds are quite different in terms of clarity. For this reason, your safest bet is to buy from a jeweller whose expert and accurate assessment you can trust.
“A diamond’s cut brings out its shine.” - Gemological Institute of America
“Diamond carat weight is the measurement of how much a diamond weighs. A metric ‘carat' is defined as 200 milligrams.” - Gemological Institute of America
At Mehta, we consider this 5th C as vital as Colour, Clarity, Cut and Carat Weight.