The Four C’s of Diamond Grading
Carat
Carat is the easiest to understand of the four C’s but is the most misunderstood. Often, people think carat refers to the diamond’s size when it actually refers to its weight. The carat of a diamond is subdivided into 100 equal parts, called points. One point equals .01 carat (or 1/100 carat). A half carat diamond is 50 points. A one-carat diamond is 100 points.
It is commonly thought that the larger the diamond, the more it will cost, but differences amongst the other C’s can make a smaller diamond much more valuable than a larger one.
Color
Nearly any colour of the rainbow can be found in a diamond; however, those diamonds with less colour are considered higher in value and are the most sought after. Diamonds are rated on a scale of D to Z for their colour; when a diamond approaches colourless, it receives a rating of D, increasing its value. Once a diamond begins to show colour, the value slides down the scale. At Minichiello’s, we keep our diamonds in the top 5 grades of the Colour Grade Scale: from D to H.
Clarity
Because diamonds are formed deep within the earth’s surface, they often have some type of ‘birthmark’. This is either inside the diamond, an inclusion, or on the surface, a blemish. The location, size, and visibility of the birthmark will determine the clarity grade of the diamond.
We carry only diamonds that are ‘flawless to the eye’. In other words, no inclusions or blemishes are visible to the naked eye, they can only be seen under 10x or higher magnification. This includes diamonds graded from Internally Flawless to SI-2 Clarity.
It is commonly thought that the larger the diamond, the more it will cost, but differences amongst the other C’s can make a smaller diamond much more valuable than a larger one.
Cut
Because diamonds are formed deep within the earth’s surface, they often have some type of ‘birthmark’. This is either inside the diamond, an inclusion, or on the surface, a blemish. The location, size, and visibility of the birthmark will determine the clarity grade of the diamond.
We carry only diamonds that are ‘flawless to the eye’. In other words, no inclusions or blemishes are visible to the naked eye, they can only be seen under 10x or higher magnification. This includes diamonds graded from Internally Flawless to SI-2 Clarity.