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Diamonds
Aids and Instruments for Cut-Grading
Aids to Clarity Grading
Artificial Color Changes in Diamonds and their Method of Identification
Comparison Brilliants as the Basis of Color-Grading
Brilliance
CIBJO
CIBJO Color
Clarity Grading
Clarity
Color-Grader
Color Grades: Origin and Nomenclatures
Color Grading
Color-Measuring Instruments
Color
Colorscope
Color Grading
Color-Measuring Instruments
Comparing diamonds of different size
Comparing diamonds of different hue
Comparison table of different Color grading systems
Conditions of Clarity Grading
Crown height
Cut Grading of Fancy Cuts
Cut-grading of small brilliants
Cut
Damage
Damaged Diamonds
Definition of Clarity Grades
Definitions of Clarity Grades according to Internal Defects in Accordance with the IDC
Deviation from circular shape
Diamond Sellers
Diamond Lite
Diamond Photometer
Diamond Imitations
Diascope Diamond Stereo Zoom microscope
Differentiating between surface features and inclusions
Dispersive brilliance
Distinguishing features
Eccentric culet
Edge displacement of crown and pavilion facets
Estimation of crown angle
Estimation of crown height
External Features
External brilliance
Extra facets
Filled Diamonds
Fluorescent diamonds
Forms of cut of diamonds
Formula for Calculating the Weight
Further fancy cuts of diamond
Gemmological Institute of America (GIA)
Gemolite
Girdle Thickness
Girdle
Growth lines
International Diamond Council (IDC)
IDC cut
Home
Illustrations P1
Illustrations P2
Illustrations P3
Illustrations SI
Illustrations VS
Illustrative Section
Indentations, damage to edges, scratches
Instructions for Practical Clarity Grading
Instruments for Color-Grading
Instruments for the Approximate Estimation of Weights of Brilliants
Internal brilliance
Introduction to Practical Color-Grading
Irradiated diamonds
Laser-drilled diamonds
Listing of Structural Defects in Accordance with IDC Rule
Listing of the External Defects in Clarity Grades in Accordance with IDC Rules
Magno-Colorscope
Means of Identification
Microphotography
Models of Microscopes
Modernising Old Cut
Natural crystal faces
New Diamond Cuts
Nicks and fractures
Origin of clarity grades and determination of nomenclature
Pavilion depth
Polishing marks
Potteratmaster
Practical Cut-Grading
Reflected inclusions
Regularity of the facets
Remission Spectrophotometer
Representation of internal and external features in the identity diagram
Scan.D.N.
Scan D.N. Clarity
Scan D.N. Cut
Scanning microscope
Scintillation brilliance
Sideways reflection to estimate pavilion depth
Size of the culet
Size of the facets
Sortoscope
Summary of instructions on practical Color grading
Summary table brilliant cut
Summary table
Symmetry Features
Symmetry of table and table edges
Symmetry of the girdle
Table comparison method
Table diameter
Table of Values Color - Clarity
Table ratio measurement
Table reflection to estimate pavilion depth
Tabular summary of diamond imitations with distinguishing features
The DZ 9 M diamond microscope
The KSW 63 diamond microscope
The technique of microscopy
Tilted table / eccentric table
Total height
Twinning lines
Types of Brilliant Cut
Varying Color impression
Weighing
Weight Tables
Weight