Αποτελέσματα Αναζήτησης
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.
- English (Uk)
GIA Cut Grade Estimation Tables for Standard Round Brilliant...
- English (Uk)
Standard round brilliant diamonds are evaluated for one of five possible cut grades: Excellent, Very Good, Good, Fair, and Poor. The cut grade is determined from a combination of measured parameters and visual obser-vations.
These tables can be used to estimate the proportion cut grade for a particular standard round brilliant, or they can be used for general cut planning.
DIAMOND GRADING CHART CLARITY Internally Flawless Very Very Slightly Included Very Slightly Included Slightly Included Included I.F. VVS 1 VVS 2 VS 1 VS 2 SI 1 SI 2 I 1 I 2 I 3 CARAT COLOR D - F Colorless G - J Near Colorless K - M Slightly Tinted N - R Very Light S - Z Light CUT Total Depth Crown Table Width Angle Pavilion Angle Girdle ...
11 Φεβ 2013 · Here is a printable diamond buying guide designed to help anyone shopping for a diamond understand the 4Cs of Diamond Quality; Color, Clarity, Cut and carat weight. Print this handy guide and take it with you wherever you need to better understand the 4Cs of diamond quality.
In 2005, the Gemological Institute of America (GIA) introduced a new diamond cut grading system. This system has become the standard for modern diamond cut grading. This introductory guide will show you what the cut grades mean and explain the criteria gemologists use to evaluate diamond cuts.
Enter a round diamond’s table %, crown angle, and pavilion angle to see how it would be scored based on the GIA and AGS proportion based cut grading systems. The best cut diamonds will sit in the intersection between GIA Excellent and AGS Ideal.
