Cut is the factor that fuels a diamond's fire, sparkle, and brilliance
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.
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The cut of a diamond not only refers to the diamond’s shape, Not only do well-cut diamonds appear more brilliant fiery, while a poorly cut diamond can appear dark and lifeless, regardless of its color or clarity. The diamond returns light back to the viewer’s eye. A well-cut diamond will appear very brilliant and it also refers
to how effectively, they also tend to appear larger than other diamonds of the same carat weight. An "ideal" diamond has both increased brilliance and diameter relative to more deeply-cut diamonds.
Poor Good Excellent Poor Very Poor
(appears dark) (appears small)
Hearts and Arrows
The term 'Hearts and Arrows cut' is given to diamonds with Excellent cut grades that show a perfect optical symmetry. When viewed from above, the 'crown', the pattern is a series of eight arrowheads. From below, the 'pavilion', the pattern appears as eight heart shapes. This much sought after characteristic is only seen in the highest grade of diamonds. To be able to see this symmetrical pattern, Hearts, and Arrows viewers are used to eliminating incoming light from certain angles and cause the pattern to appear in UV light.
Super Ideal Cut
Diamond clarity refers to the absence of these inclusions and blemishes.
Diamonds without these birthmarks are
rare, and rarity affects a diamond's value.
Clarity is the number of inclusions, if any, within a diamond. Almost all diamonds contain some sort of natural inclusion. They occur when there is a disturbance in the process of a formation of a diamond over millions of years.
What is the different " GIA"?
Using the GIA International Diamond Grading System™, diamonds are assigned a clarity grade that ranges from flawless (FL) to diamonds with obvious inclusions (I3). The GIA Clarity Scale includes eleven clarity grades ranging from Flawless to I3. Because diamonds form under tremendous heat and pressure, it is extremely rare to find a diamond that lacks any internal and external characteristics. These characteristics are a byproduct of its formation and help gemologists separate natural diamonds from synthetics and stimulants, and identify individual stones.
A GIA clarity scale rates diamonds from flawless to included (heavy inclusions).
Flawless diamonds are crystal clear inside and out, without any inclusions, and are super rare. At the other end of the range is included-3, with extremely evident inclusions. Inclusions are fine, so long as they are not visible to the naked eye.
Diamond color is all about what you can't see. Diamonds are valued by how closely
they approach colorlessness
the less color, the higher their value.
Color grades are determined by comparing each diamond to a master set. Each letter grade represents a range of color and is a measure of how noticeable color is. Fluorescence Some diamonds can emit visible light when exposed to ultraviolet radiation, but fluorescence is not a factor in determining color or clarity grades.
What is Fluorescence?
Fluorescence is a naturally occurring phenomenon that appears in certain minerals and gems. Some quality diamonds display a visible light when they are exposed to ultraviolet light. This light is known as fluorescence. Under most lighting conditions, a diamond's fluorescence is not visible to the naked eye, although the diamond will exhibit a soft colored glow if held under an ultraviolet lamp
Diamond Fluorescence is caused by the natural mineral properties of the diamond and has been studied numerous times by the Gemological Institute of America, or the GIA, to gain a better understanding of the debated issue. A study in 1997 done by the GIA suggested that the presence of fluorescence makes very little difference in the appearance of a diamond. Despite these findings, the existence of fluorescence has greatly influenced the pricing of diamonds.
How Does Fluorescence Affect A Diamond?
Fluorescence usually has no effect on a diamond's appearance in regular lighting conditions. In some cases, however, strong blue fluorescence can make a yellow colored diamond appear whiter. In rare cases, it can or cause a stone to appear milky or oily.
Does/Doesn't Diamond fluorescence does/doesn't affect the value?
Jewelry professionals disagree about whether fluorescence adds to or detracts from the value of a diamond. Some trade professionals believe those very rare diamonds at the high end of the D-to-Z color scale that have extremely strong blue fluorescence are worth less than their non-fluorescent counterparts because the fluorescence can affect their transparency by giving them a hazy or milky appearance. Conversely, some traders pay higher prices for blue-fluorescing diamonds of a lower color grade because, as noted above, they believe the fluorescence masks the faint to very light yellow color of these diamonds.
Diamond fluorescence and its effect on value is not a simple question, and there isn’t a simple answer. We recommend that you compare diamonds in a variety of lighting environments and choose the stone that you like best. Ultimately, GIA believes the beauty of a diamond is truly in the eye of the beholder.
Fluorescent diamonds generally cost 10% to 15% less than diamonds graded "faint" or “none." That means great value and major savings. Fluorescence very rarely affects a diamond in any visual way. GIA simply measures it for transparency purposes.
Most people think of a carat
in terms of the size of the diamond,
but it is actually based on weight.
The weight of a diamond is traditionally measured in terms of carat, a unit of weight with 1 carat equaling,
20 grams. Each carat is divided into 100 points, allowing for a very precise measurement of the diamond.