Section 5: Cut
Cut Versus Shape (5.01)
The Anatomy of a Brilliant Cut Diamond (5.02)
Designing the Modern Cut (5.03)
Refractive Index (5.04)
Single and Double Refraction (5.05)
Diamond’s Containment of Light (5.06)
Transmitted Light (5.07)
The Critical Angle (5.08)
Pavilion Angle (5.09)
Crown Angle (5.10)
Measuring Crown Angles (5.11)
Proportionscope (5.12)
Judging Angles (5.13)
The Pavilion Main Method (5.14)
Estimating Pavilion Angle (5.15)
Table Reflection Method (5.17)
The Pavilion Depth (5.16)
General Rules for Pavilion Depth Estimation (5.18)
Deep Pavilions (5.19)
Shallow Pavilion (5.20)
The Culet (5.21)
Handling a Culet (5.22)
Fish-eye (5.23)
The Table (5.24)
Measuring Table Size (5.25)
The Table Percentage Ratio Method (5.26)
The Table Percentage Bowing Method (5.27)
Ideal Star Shape (5.28)
Estimating Table Size by Eye (5.29)
Likeliness of Breakage (5.30)
Girdle Thickness (5.31)
Girdle Thickness and Color Grade (5.32)
A Bruted Girdle (5.33)
A Faceted Girdle (5.34)
The Overall Appearance of the Girdle (5.35)
Upper and Lower Halves (5.36)
The Role of the Upper and Lower Halves (5.37)
Lower Halves Height (5.38)
Upper Halves Height (5.39)
Cutting the Upper and Lower Halves (5.40)
The Star Facets (5.41)