Diamond Cut Cubic Zirconia and Synthetic Gemstones China Wholesale

posted Dec 14, 2010, 11:18 PM by FU RONG GEMS   [ updated Mar 22, 2015, 9:11 PM ]
Diamond Cut Stones:
In talking about the cut of a diamond, we are referring to the proportions of the diamond as opposed to its shape (round, marquise, pear, princess, etc.). The cut has the greatest influence on the fire and brilliance of a diamond. A well cut stone with the correct angles and number of facets will reflect and refract light back out the top of the diamond for maximum brilliance. A stone that is cut too deep or too shallow may appear lifeless or dark when compared to a correctly cut stone.
The cut of a diamond as a value factor refers to its proportions , symmetry and finish. It is not to be confused with its shape. Proportion refers to the angles and relative measurements of a polished diamond. More than any other feature, proportions determine a diamond's optical properties. Studies have shown that table size, crown angle, and pavilion depth have a dramatic effect on a diamond's appearance.
Symmetry is a grading term for the exactness of shape and placement of facets. Variations in symmetry include off-center culets and tables, poor facet alignment, misshapen facets, out-of-round girdles, and wavy girdles.

Diamond Shapes:

Shapes other than the standard round brilliant shown above are called fancy shapes or fancy cuts. Their names are based on their shapes. The best known are the heart, marquise , pear shaped cut , emerald cut , oval radiant, and  princess.