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    Carat Weight

    Diamonds are measured in carats, a small unit of measurement equal to 200 milligrams. A gem stone's carat weight should not be confused with the "karat" weight of gold, which is actually a measurement of purity rather than weight. Each carat is divided into 100 points. Therefore, a half-carat stone may be referred to as a "50-pointer," a quarter carat, "25-points," etc. Carat is the easiest of the 4 C's to determine because of the use of sophisticated measuring equipment. However, two diamonds of equal carat weight might vary greatly in value depending upon their cut, colour and clarity. This is important because when mounted, one diamond may appear larger than another, although they actually weigh the same.  

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    Because large diamonds are rare, they generally have a greater value per carat. For example, the price of a two-carat stone will be several times higher than four 50-pointers of equal quality.  


    Diamond Colour

    Diamond colour grades start at D and continue through the alphabet. Truly colourless stones, graded D, are extremely rare and very valuable. The closer a diamond is to being colourless, the rarer and more valuable it is. Diamonds were formed under intense heat and pressure, and traces of other elements incorporated into their atomic structure account for the variances in colour. A single change in colour grade can significantly affect a diamond's value. It is the lack of colour, or whiteness in a diamond that allows the light to pass effortlessly through the stone and disperse that beauty back to the observer.   

    diamons

    Because large diamonds are rare, they generally have a greater value per carat. For example, the price of a two-carat stone will be several times higher than four 50-pointers of equal quality.  

    Diamond Cut

    Cut refers the shape of a diamond and its mathematical proportions. Diamonds are cut into numerous shapes, depending upon the nature of the rough stone.   

    diamons

    The next aspect of cut is the quality of the proportions. Cut, more than any other quality aspect, gives the diamond its sparkle. A diamond gets its brilliance and scintillation by cutting and polishing the diamond facets to allow the maximum amount of light that enters through its top to be reflected and dispersed back. When all the angles are correct, the light that enters is dispersed back through the diamonds top facets. When a stone is cut too shallow or too deep, light that enters through the top is allowed to escape through the bottom and does not allow the maximum beauty of the diamond to be realised. 
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    A diamond cutter spends years mastering his craft, learning how best to cut a rough diamond to achieve the ultimate cut with the fewest imperfections and the least loss of carat weight. The better the cut, the more valuable the diamond.

    Ideal Cut


    Mathematician Marcel Tolkowsky was the first to discover the exact angles to which a diamond must be cut in order to produce maximum brilliance. In an Ideal Cut, all of the light that enters the stone refracts internally from 57 to 58 precisely placed facets and disperses through the top of the diamond, producing fire and brilliance. Only a round brilliant cut diamond can achieve the proven mathematical proportions and symmetry of an Ideal Cut. Very Good Cut
A Very Good Cut is close to an Ideal Cut, with only slight variations in its measurements. It may achieve Ideal Cut proportions but vary in its polish or symmetry rating. Hence, a Very Good Cut diamond still creates remarkable brilliance and luster, often reflecting back the maximum amount of light if its table and depth percentages match those of an Ideal Cut.

    Good Cut


    A Good Cut diamond is well proportioned and reflects back a good amount of light. Inferior Cut
Many diamonds are “spread” in their cut to increase carat weight when cutting from the original rough. Although you may end up with a diamond that appears larger, your sacrifice will be brilliance and fire. Too Deep
When When cut too deep, a diamond loses light out of the bottom, leaving the centre of the diamond dark in appearance.

    Too Shallow


    When cut too shallow, a diamond loses light out of the bottom, reducing brilliance and giving the stone a dark, glassy appearance. A diamond's cut is graded by several measurements. Its depth percentage, a measurement of the height vs. the width of the stone and its table percentage, a measurement of the diameter of the top facet of the stone vs. the stone's average width, are two key factors in determining the quality of a diamond’s cut. These percentages are detailed on the GIA Gem Trade Laboratory Diamond Grading Report that accompanies every Affinity Diamonds loose diamond.

    Diamond Clarity

    Diamonds are measured in carats, a small unit of measurement equal to 200 milligrams. A gem stone's carat weight should not be confused with the "karat" weight of gold, which is actually a measurement of purity rather than weight. Each carat is divided into 100 points. Therefore, a half-carat stone may be referred to as a "50-pointer," a quarter carat, "25-points," etc. Carat is the easiest of the 4 C's to determine because of the use of sophisticated measuring equipment. However, two diamonds of equal carat weight might vary greatly in value depending upon their cut, colour and clarity. This is important because when mounted, one diamond may appear larger than another, although they actually weigh the same.  

    Because large diamonds are rare, they generally have a greater value per carat. For example, the price of a two-carat stone will be several times higher than four 50-pointers of equal quality.  

    Diamonds that reveal no flaws on the surface or internally. These are the rarest and most beautiful gems treasured for their absolute purity. 

    Because large diamonds are rare, they generally have a greater value per carat. For example, the price of a two-carat stone will be several times higher than four 50-pointers of equal quality.  

    FL & IF

    Diamonds that reveal no flaws on the surface or internally. These are the rarest and most beautiful gems treasured for their absolute purity.

    VVS1 or VVS2

    Diamonds with minute inclusions absolutely invisible to the naked eye. Only through careful inspection with a microscope can these tiny inclusions be accurately pinpointed. The brilliance of the stone does not suffer in this category.

    VS1 or VS2

    Diamonds with tiny inclusions difficult to locate. Only a trained eye looking through a 10X loupe can pinpoint the inclusions in this category. The inclusions are nearly impossible to see with the naked eye.

    SI1 - SI3

    Diamonds with inclusions easily identified through a loupe. Finding flaws in this category with the naked eye is difficult. The gems in this category maintain their integrity, depending on the location of the inclusions. They are an attractive choice when working within a fixed budget without sacrificing beauty or value.

    I1 - I3

    Diamonds with inclusions that may or may not be easily seen by the naked eye. The flaws on the stones in this category will have some effect on the brilliance of your diamond.

    THE 5 C'S OF DIAMOND VALUE

    Carat Weight | Colour | Clarity | Cut | Confidence

    (1) CARAT WEIGHT


    Prices are quoted in dollars per metric carat. One carat or 1.00ct is divided into 100 points. It takes almost 142 carats to equal one ounce. Under one carat, weight is usually stated in points; for example .75ct is referred to as seventy-five points or a seventy-five pointer. The larger the diamond, the greater the carat price. Therefore a 2.00ct diamond costs much more than the cost of two 1.00ct diamonds because finding a large sized rough diamond is far more uncommon than finding smaller rough stones.

    (2) COLOUR


    Diamonds in the normal range are graded and evaluated by how closely they approach absolute colourlessness. Most diamonds sold in the retail trade run from very nearly colourless to slightly yellow or brown, the normal range. The Gemological Institute of America divides diamonds in the normal range into grades ranging from D = Colourless through to Z = very light yellow or brown. Diamonds with more colour than Z are referred to as "Fancy" colours.

    (3) CLARITY

    Clarity is the degree to which a diamond is free from blemishes and inclusions. Blemishes are external while inclusions are internal. Grading is done with a 10 X magnification and is divided into a number of categories ranging from Flawless - F, Internally Flawless - IF, Very Very Slightly Included 1 or 2 - VVS1 or VVS2, Very Slightly Included 1 or 2 - VS1 or VS2, Slightly Included 1, 2 or 3 - SI1, SI2 or SI3, and Imperfect 1, 2 or 3 - I1, I2 or I3. Clarity characteristics in stones with a grading of SI1 or above cannot be seen with the naked eye. In the I grades, inclusions can be seen with the naked eye. There are, however, rare diamonds in which trained graders working with 10 X magnification under controlled conditions can see neither blemishes nor inclusions. These stones are called flawless and are highly prized. At the opposite end of the scale, imperfect stones contain inclusions that are eye visible or affect durability and transparency. Between these extremes are diamonds with inclusions ranging from difficult to see to easy to see under 10 X magnification, but having little effect on appearance, beauty and durability.

    (4) CUT

    Cut is the human contribution to a diamond's beauty and has important effects on each of the other C's; it can both enhance colour and hide inclusions. The final weight, face-up colour, clarity, overall brilliance and scintillation depend primarily on the cutter's skill. Tiny variations make differences which are obvious to the trained eye.

    (5) CONFIDENCE

    With all theses variables to consider when purchasing a diamond, it is essential that you have confidence in your jeweller to provide the expertise you can trust. As your jeweller we assure you that you're getting exactly what you've been promised, a brilliant, well cut diamond, whatever your price range.