Diamond Education page
What is Diamond?
Diamond is a mineral which is typically about 99.95 percent CARBON. Diamond is a mineral made of single carbon element. Diamond characteristic chemical composition and crystal structure make its unique member of mineral Kingdom.
Diamond value is ased on its own unique combination of four C’s and special set of value factor to describe and classify Diamonds CLARITY, COLOUR, CUT & CARAT. these are known as the four C’s when used together its described the quality of a finished diamond which is directly related to its value.
The Four C’s are universal and effective communication tools for member of the diamond industry.
Diamond have internal geatures called Inclusions and surface irregularities called Blemishes, Together they are called clarity characteristic.
Inclusion: Clarity characteristic totally enclosed in a polished stone or extending into it from the surface.
Blemish: Clarity characteristic that’s confined to the surface of a polished stone.
Clarity characteristic: The collective term for inclusions and blemishes.
Inclusions normally have more impact on a diamond’s beauty and value than blemishes.
A flawless diamond shows no inclusion and no blemishes when examine under 10X magnification
IF (INTERNAL FLAWLESS)
An IF diamond shows only insignificant blemishes – no inclusion – when examined under 10X magnification
VVS1, VVS2 (VERY VERY SLIGHTED INCLUDED)
VVS diamond contain minute inclusion that are very difficult to see under 10X magnification. In VVS, Inclusions are almost impossible to detect with the naked eye and barely.
VS1, VS2 (VERY SLIGHTED)
VS diamond contains minor inclusion that ranges from difficult to somewhat easy to see under 10X magnification.
SI1, SI2 (SLIGHTY INCLUDED)
SI diamonds contain noticeable inclusions that are easy or very easy to see under 10X magnification.
Diamond in the I range contain inclusions that are obvious under 10X magnification or Eye –Visible without loupe/magnifier.
In diamond color scale begins with D (Colorless) and continues through the alphabet to Z (Light, yellow or brown). A diamond’s color grade is based on its tone and saturation, and requires an assesment of its absence of color. This means that the less yellow, brown or gray there is in a diamond, the higher its color grade.
The level of color scale can be divided into colorless, near-colorless, faint, very light and light ranges.
The D-E-F grades are considered colorless. D and E diamond have virtually no color, and F has a nearly detectable amount of color.
The G-H grades are very near colorless or like very less noticeable if compare to better colorlerss grades. The I-J grades are looks colorless faceup and nearly colorless face-down.
Diamond in the K-L-M grades show very faint color face-up and face-down.
N-R (VERY LIGHT)
N through R – very light yellow, brown, or gray.
S through Z diamonds ar light yellow, brown, gray. They shows substantial color face-up of face-down.
A well-cut diamond maximizes the light that strikes each pavilion instead of escaping through other parts of the diamond, light reflects back through the crown and table. Ideal cuts are well proportioned with optimal facet angles, allowing the brilliance and fire to pass through the
A well cut diamond can make light perform in breathtaking ways, resulting in a magnificent display of three important diamond attributes – BRIGHTNESS, FIRE, SCINTILLATION. Cut refers to the quality of the Symmetry, proportions and polish of the diamond.
Diamond Cut Proportions directly affect a diamond’s ability to reflect light and provide brilliance. Proportions are based on the ratios between size, angle and shape of each diamond facet. Various combinations of these elements impact how the diamond will interact with light, which determines its overall beauty and lasting appeal.
DIAGRAM OF DIAMOND WITH LIGHT FLASHES
|Excellent||Excellent Cut Diamonds provide the highest level of fire and brilliance. Because almost all of the incoming light is reflected through the table, the diamond radiates with magnificent sparkle.|
|Very Good||Very Good Cut Diamonds offer exceptional brilliance and fire. A large majority of the entering light reflects through the diamond’s table. To the naked eye, Very Good diamonds provide similar sparkle to those of Excellent grade.|
|Good||Good Cut Diamonds showcase brilliance and sparkle, with much of the light reflecting through the table to the viewer’s eye. These diamonds provide beauty at a lower price point.|
|Fair||Fair Cut Diamonds offer little brilliance, as light easily exits through the bottom and sides of the diamond. Diamonds of a Fair Cut may be a satisfactory choice for smaller carats and those acting as side stones.|
|Poor||Poor Cut Diamonds yield nearly no sparkle, brilliance or fire. Entering light escapes from the sides and bottom of the diamond.|
DIAGRAM OF DIAMOND WITH LIGHT FLASHES
Diamond weight are stated in the metric carats abbreviated cts., The international unit of measurement for gem weight one metric carat is one-fifth (0.200) of a gram. The metric carat is divided into 100 points. A point (abbreviated ‘‘pt.’’) is one hundredth of a carat. Eg one carat is equals to 100 points or 100 cents.
|0.25||0.50||5.1 mm||5.8 mm||6.4 mm||6.8 mm|
|Carat||1.50||1.75||2.0 mm||3.0 mm||5.0 mm|