Gia Diamond Cut Grades

Non standard round brilliant cut diamonds.

Gia diamond cut grades.

Cut is the most complex of a diamond s 4cs. The gia diamond cut scale for standard round brilliant diamonds in the d to z diamond color range contains 5 grades ranging from excellent to poor and is the definitive scale for classifying diamond cuts. Diamond quality can be communicated in a universal language and diamond buying consumers can know exactly what they are about to purchase. And a simplified proportion.

Let s cover some essentials so you can pick the perfect round brilliant diamond engagement ring. A description of its shape and cutting style. The gia cut grading system introduced in 2005 and validated by thousands of observations by retailers manufacturers and the public who looked at real diamonds and described why they thought certain diamonds were the best looking can help you understand what to look for in a well cut diamond. But reports do contain an assessment of the diamond s polish and symmetry.

The 4cs means two very important things. A gia diamond cut grade is key to knowing how well your round brilliant diamond will sparkle. Gia cut grade estimation tables for standard round brilliant cut diamond explains how to locate a particular proportion combination and determine whether it is close to a boundary in the cut grading system. Like gia the lumera cut grade is based on a variety of factors and is conservatively applied.

Gia created the 4cs color clarity cut and carat weight as a universal method for establishing the quality of any diamond anywhere in the world. For diamonds without a gia cut grade because the diamond was certified before gia began assigning cut grades in 2005 or is a shape that gia does not currently assign cut grades to lumera will apply its own cut grade according to a proprietary formula. Full color 8 page booklet. It also discusses how to use facetware online to obtain a more accurate estimate of a cut grade.