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A carat is a unit of measurement used to weigh a diamond. One carat is equal to one fifth of a gram (0.2 gram) or 200 mg. One carat is equal to 100 points or 100 cents.
Carat weight is the most objective of the 4 C’s of diamonds as it involves no estimates, comparisons or judgements.
Visual effect of carat weight on a diamond’s appearance seems fairly obvious: the more a diamond weighs, the larger it will look. However, this is not always the case. As most people in the trade already know, cut proportions can also affect the perceived size of a diamond.
Carat weight is directly related to a diamond’s value because (all else being equal) larger diamonds are rarer than smaller ones. As a result, larger diamonds cost more per carat than smaller diamonds (e.g., a 2.00 ct diamond of the same quality can cost more than twice the amount of a 1.00 ct diamond).
The color of a diamond is one of the vital factors influencing the price of diamond
Only minute traces of color can be detected by an expert gemologist.
The highest color grade, which is extremely rare.
Slight color detected by an expert gemologist, but still considered a "colorless" grade. A high-quality diamond.
Color noticeable when compared to diamonds of better grades, but these grades offer exellent value.
Color slightly detectable.
Fancy Colored Diamond Grading
Cut refers to the quality of the proportions, polish and symmetry of a diamond. Of the 4C’s, the cut is the aspect most directly influenced by man, whereas the other three C’s are influenced by nature.
Quite often the cut of a diamond is confused with its shape, but it actually is about a diamond’s proportions, such as its depth and width and the uniformity of its facets–all characteristics that control brilliance, durability and other features we look for in a diamond.
The brilliance of a diamond depends a lot on its cut. Whatever the shape, a well-cut diamond always reflects better light. Diamonds with perfect colour or clarity also display reduced brilliance if it’s cut poorly.
(Importance of Cut)
When the cut of a diamond is too shallow, light escapes through the pavilion before it can be reflected.
When the cut of a diamond is too deep, some light escapes through the opposite side of the pavilion.
A polished diamond’s beauty lies in its complex relationship with light: how light strikes the surface, how much enters the diamond, and how, and in what form light returns to your eye.
The result is a display of three attributes. Brightness is the combination of all white light reflecting from the surface and interior of a diamond. Fire is the coloured flashes that can be seen in a diamond. Scintillation describes the sparkle of light you see in a diamond, and the overall pattern of bright and dark areas when you look at a diamond face-up. A polished diamond’s proportions affect its light performance, which in turn affects its beauty and overall appeal. Diamonds with good proportions optimize the interaction with light, and have good brilliance, fire, and scintillation.
Polish and Symmetry
Polish and symmetry are two other important aspects of the cut. Polish describes the smoothness of the diamond’s facets (surface conditions), and symmetry refers to alignment of the facets (the exactness of shape and placement of the facets).
To ensure a diamond has good symmetry, each facet must be consistently sized and positioned opposite its corresponding facet. Symmetry refers to the alignment of one part of the diamond to another. The exactness of a finished diamond shape and the placement of its facet constitute symmetry. .. With poor symmetry, light can be misdirected as it enters and exits the diamond.
Polishing is the final step in diamond cutting. Ideally a diamond should be free of any visible polish lines, burn marks, scratches or abrasions under 10 x magnifications. The smoother the polish, the more beautiful and brilliant the diamond will appear. Surface facets of a poorly polished diamond appear blurred or are dull in their sparkle.
- Diameter: The width of the diamond as measured through the girdle.
- Table: This is the large, flat top facet of a diamond.
- Crown: The upper portion of a cut gemstone, above the girdle.
- Girdle: The narrow rim of a diamond that separates the crown from the pavilion. It is the largest diameter to any part of the stone.
- Pavilion: The lower portion of the diamond, below the girdle. It is sometimes referred to as the base.
- Culet: The tiny facet on the pointed bottom of the pavilion.
- Depth: The height of a diamond, from the culet to the table.
Another characteristic that does not affect the color grade of a diamond but is worth keeping in mind is fluorescence This characteristic refers to the diamond’s ability to fluoresce under ultraviolet (UV) light. The most common source of UV is a black light. When exposed to UV light, many diamonds will give off a distinctive glowing blue coloration. Although fluorescence may be displayed in various colors, blue is the most common in diamonds. The fluorescence of a diamond is defined by its intensity as either None, Faint, Medium, Strong, or Very Strong.
The following table guides u on the size and location of the White Inclusion in our diamonds.
VLBC – Very light black in center
LBC – Light black in center
BIC – Black inclusion center
MBC – Major black in center
VLBCS – Very light black center & side
LBCS – Light black in center & side
VLFC – Very light feather in center
LFC – Light feather in center
FIC – Feather inclusion center
MFC – Major feather in center
VLBCS – Very light ftr center & side
LFCS – Light feather in center & side
VLBS – Very light black on side
LBS – Light black on side
BIS – Black inclusion on side
MBS – Major black on side
BCS – Black in center & side
MBCS – Major black in center & side
VLFS – Very light feather on side
LFS – Light feather on side
FIS – Feather on side
MFS – Major feather on side
FCS – Feather in center & center
MFCS – Major feather center & side
Is a term we use for clarity in diamonds, where the piece when viewed FACE UP looks
clean to the un-aided/naked/open eye.