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Site Map
About GemGate.com
- Handling a Culet
- Fish-eye
- The Table
- Measuring Table Size
- The Table Percentage Ratio Method
- The Table Percentage Bowing Method
- Ideal Star Shape
- Estimating Table Size By Eye
- Likeliness of Breakage
- Girdle Thickness
- Girdle Thickness and Color Grade
- A Bruted Girdle
- A Faceted Girdle
- The Overall Appearance of the Girdle
- Upper and Lower Girdle Facets
- The Role of the Upper and Lower Girdle Facets
- Lower Girdle Facet Height
- Upper Girdle Facet Height
- Cutting the Upper and Lower Girdle Facets
- The Star Facets
Diamond Cut
- Cut Versus Shape
- The Anatomy of a Brilliant Cut Diamond
- Designing the Modern Cut
- Refractive Index
- Single and Double Refraction
- Diamond's Containment of Light
- Transmitted Light
- The Critical Angle
- Pavilion Angle
- Crown Angle
- Measuring Crown Angles
- Proportionscope
- Judging Angles
- The Pavilion Main Method
- Estimating Pavilion Angle
- The Pavilion Depth
- Table Reflection Method
- General Rules for Pavilion Depth Estimation
- Deep Pavilons
- Shallow Pavilion
- The Culet
- Doubleering
- Crystal
- Indented Natural
- Internal Graining
- Knot
- Laser Drill Holes
- Needle
- Pinpoint
- Blemishes
- Abrasion
- Extra Facet
- Natural
- Nick
- Pit
- Polish Lines
- Polish Marks
- Rough Girdle
- Scratch
- Surface Graining
- Assigning a Clarity Grade
- Prepare Yourself for Clarity Grading
- Diamond Cleaning
- Indicating Factors of Assigning a Clarity Grade
- Make the Call
- The Grade-Maker
- Clarity Grade Definitions
Clarity
- Cleaning a Diamond
- What is Diamond Clarity?
- Magnification Tools
- Lens Curvature
- Gem-scope
- Clarity Grading
- Dark-Field Loupe
- Clarity Grading and Opinion
- GIA Clarity Grading System
- Pique
- Blemishes and Inclusions
- Clarity Grading Magnification
- Clarity Grading With a Loupe
- Holding the Diamond in Tweezers
- Grading Clarity
- Practice on a Sample
- Inclusions
- Bearding
- Bruise
- Cavity
- Chip
- Cloud
- Feather
- Fracture-Filled (Clarity Enhanced)
- Brown Hues and Color Grading
- Color Grading Position
- Colorimeters
- Fancy Colors
- Fancy Color Value Diversity
- Brown Tones
- Rare Colors
- Color Treated Diamonds
- Irradiated Diamonds
- The Cyclotron
- Nuclear Reactor Method
- Van de Graff Generation Method
- Radioactive Residue
- Americium-241
- Irradiated Diamond Valuation
- Natural Fancy Colors
- Fancy Color Valuation
- Origin of Color Report
- HPHT Treatment
- Fluorescence
- Gem Instruments 'Gem Diamond Lite'
- Effect on Color
Color
- Color by Definition
- White Light
- The Three Characteristics of Diamond's Color
- Hue
- Saturation
- Tone
- Atomic Structure
- Color in Rough
- GIA Color Grading Scale
- Master Stones
- Choosing Master Stones
- GIA/GTL Master Stone Requirements
- Number of Masters
- Master Stone Arrangement
- Master for Fancy Colors
- Cubic Zirconia Masters
- Lighting and Color Grading
- Prepare Yourself for Color Grading
- Clean Diamonds and Color Grading
- Discerning Slight Color Differences
- Color Deviations
Diamond Synthetics and Imitations
- Imitation or Synthetic?
- A Brief History
- More Recent Advances
- Synthetic Identification
- Keep Informed
- Moissanite
- Cubic Zirconia
- Other Imitations
Grading Color in Mounted Diamonds
- Grading Color Accurately in a Mounting
- Within Three Color Grades
- Clean it First
- The Metal Effect on Color
- Master Stones
- A Setter's Rule of Thumb
- Blue Fluorescence Effect
- Contigent Offer
- Recuts and Repairs
- A Hidden Inclusion
- Color Effect
- Chipped Diamond Re-Cut
- Why Diamonds Chip
- Recut Weight Loss
- Size of a Girdle Chip
- Culet Chip
- Recutting Chipped Old Cuts
- Flat European Cut
- Weight Loss Example for a Flat Euro
- Choosing A Diamond Cutter
- Growing Diamonds
- Weight Retention and Finish
- Grading a Cutter's Skill with a GIA Report
Diamond Cutting
- A Secret History
- Magical Powers
- The Point Cut
- Diamond Cutting Terminology
- Cleaving
- Sawing
- Faceting
- The First Polishing Process
- The Diamond Cutting Wheel
- Beginning a Facet
- Diamond Cutting Dops
- Laser Usage in Diamond Cutting
- Girdling (Bruting)
- Bruting in Contrast to Polishing
- Bruting in History
- Cutting Shop Specialties
- Stages of Cutting Rough
- Locating the Right Diamond
- Dealing With Diamond Suppliers
- After the Diamond is Located
- Receiving the Diamond From Your Supplier
- Your Presentation
- Your Customer Base
- Is Retail For You?
- Dealing With the Trade
- Working for a Wholesale Diamond Company
- On-The-Job Training
- Starting Your Own Wholesale Company
- Membership in the Jewelers Board of Trade
- Current JBT Credit Information
- New Accounts
- Starting With a Small Inventory
- Creating Contact in the Trade
Selling Diamonds
- Selling Honestly
- Memoradums and Credit
- Memoradums and Sales
- The Importance of your Credit Rating
- Establishing Credit
- The Jewelers Board of Trade
- Selling Your Diamonds
- Dealing With the Public
- Educate Your Customer
- Basic Diamond Business Necessities
- Diamond Knowledge
- Competitiveness
- Qualifying Your Customers
- Typical Telephone Conversation
- Example Diamonds
- Lab Report Example
- Questions to Ask in Qualifying the Customer
- Customer Objections
