The cut of your diamond refers to the proportions and facets of the stone, how they interact with each other and how the light is returned to the eye. This means that generally, the higher the cut grade, the brighter the diamond.
How does the cut of my diamond affect light?
When a diamond is cut, it is important that attention and care is taken calculating the exact proportions being created as it directly effects how the light will move within the diamond. Each flat, geometric shape that you can see on your stone is called a facet and these reflect light. If the cut or proportions of the stone are off, the light will not reflect back effectively making it appear darker.
What makes a diamond sparkle?
The optical effects that give a diamond sparkle are referred to as brightness, fire, and scintillation:
- Brightness is the white light reflection.
- Fire (also called dispersion) is the colored light reflection.
- Scintillation is the sparkle in a diamond.
How do you determine the cut grading of my diamond?
Though the diamond industry has known for a while that proportions play a pivotal role in the appearance of a diamond, they did not create a scale to grade cut until relatively recently. Pioneering the cut grading scale, the American Gem Society introduced a 0-9 scale, with 0 being the most ideal cut. They were soon followed by the GIA (Gemological Institute of America), whose cut grade ranges from ‘Excellent’ to ‘Poor’. Cut is now considered an important part of the diamond grading process. As always, the GIA’s grading is considered the most accurate in the industry.
Does cut also mean shape?
Sometimes when people refer to the cut of their stone, they are referring to the shape of the diamond. Depending on the current trends, the shape of your diamond can have a huge impact on price. For instance, round brilliant diamonds will always hold their value better than fancy shapes. A fancy shaped stone is any shape that is not round. The most common fancy shapes are: princess, marquise, pear, oval, heart, cushion, radiant, and emerald cuts.