THE IGS DIAMOND BUYER'S HANDGUIDE

TABLE OF CONTENTS

INTRODUCTORY PAGES

  • Instructions on how to use the e-mail program and your personal 5-digit access code
  • Newspaper article from the 'Thornhill Liberal' concerning the IGS lab.
  • Summary of the EIGHT important steps to follow when purchasing a diamond

DEFINITIONS AND DIAGRAMS Pages I to VI

  • Complete definitions for terminology used in the trading of diamonds accompanied by diagrams that clearly illustrate points made
  • A SPECIAL NOTE REGARDING CERTIFICATED DIAMONDS
  • ADVICE ON PURCHASING DIAMONDS OVER THE INTERNET
  • A SPECIAL NOTE REGARDING  MOISSANITE
  • A SPECIAL NOTE REGARDING FLUORESCENCE IN DIAMONDS

INTRODUCTORY SECTION - OVERVIEW OF THE ENTIRE PROCEDURE PAGES 1 - 2

SECTION ONE PAGES 2 - 4

  • Why is this guide so important? 
  • The modern round brilliant cut diamond and the fancy cut diamonds. 
  • What quality of diamond should you buy?; VS; vs. SI, E colour; vs. H colour etc.
  • Going for a larger diamond but in an I clarity. 
  • The new SI-3 grade, what does it mean?
  • Other related topics.

SECTION TWO PAGES 4 - 7

A comprehensive list of all the possible places you may purchase your diamond from. A detailed description of eight sources in your own city that you would never have thought of going. You can really convert your shopping experience for a diamond into a real adventure.....and really enjoy the whole experience.

SECTION THREE PAGES 7 - 8

Look professional when you purchase a diamond. How to properly use the loupe. Specific items to look for when the diamond is under the loupe. How to properly view colour in a diamond. How to properly view the proportions of the diamond. Specific hazards to be on the lookout for. Who's your number one priority?

SECTION FOUR PAGES 9 - 10

What the jeweller should specify on the bill of sale. What you should do to protect yourself at the time you purchase the diamond. Specific 'DO's and DON'TS' at the time you buy your diamond. Your visit to the gemmologist. 'DO's and DON'TS' at the gemmologist's lab. 

SECTION FIVE PAGES 10 - 12

How to handle the loose diamond. Is the gemmologist qualified? Laser gemprinting and its importance. How to find an authorized agent near you. There are numerous agents throughout the US & Canada. Check up on the gemmologist - if there's something he forgot to do, you'll be able to tell him what it is. What is a heat conductance test? Determining the weight of the diamond in the setting. Fluorescence in diamonds. Why do diamonds fluroesce and does it add to their value?

SECTION SIX PAGES 12 - 13

  • How much variation should you allow between different appraisals?
  • Looking at the entire picture.
  • When should you decide to buy a diamond?

SECTION SEVEN PAGES 13 - 17

  • Significant questions to ask the gemmologist. 'Fish-eyes' - What are they?,
  • Diamonds that look dark and blackish? Diamonds cut too shallow and too deep.
  • The right percentage figures without getting too complicated.
  • Just how important is the girdle?
  • The table of the diamond.
  • The crown of the diamond.
  • A quick review and detailed checklist of items to check with your gemmologist.
  • What's the bottom line?

SECTION EIGHT PAGES 18 -20 

Choosing the setting. 14kt. vs 18kt. 18kt. white gold vs. platinum. The different ways settings are made? How do you choose a setting. 4-claw vs. 6-claw. What to do when leaving your diamond for a setting? The proper costs of settings.

SECTION NINE PAGES 20 - 21

Returning to the gemmologist for your final appraisal. Things to look for once you pick your ring up. Insurance on your diamond ring. Electrical resistance testing.

SECTION TEN PAGES 21 - 22

Nine very important tips on how to properly take care of your diamond ring. 

SECTION ELEVEN PAGES 23 -28 + 4 CHART PAGES

The prices of diamonds. What constitutes a good price? Price adjustments due to the cutting grades. Detailed wholesale and appraisal value price charts for all the sizes and qualities of diamonds. How to determine the value for any diamond including all the fancy cut diamonds. Sample price calculations. 

4- PAGES OF DETAILED UP-TO-DATE PRICE CHARTS

SECTION TWELVE PAGES 28 - 30

Why are diamonds so valuable? Why you should avoid selling your diamond. The diamond market and how it works. The reasons for having your jewellery appraised. 

SECTION THIRTEEN PAGES 30 - 31

General Introduction to diamonds. The factors determining value in diamonds. 

Looking at the diamond through the microscope and the loupe. WHAT'S THAT BIG CRACK THAT EVERYONE GETS NERVOUS ABOUT WHEN THEY LOOK AT THE SIDE OF THE DIAMOND? How do the diamond tweezers work? 

SECTION FOURTEEN PAGES 31 - 33

A detailed look at the different clarity grades of diamonds. How do you know what clarity grade your diamond is? What clarity grade diamonds to avoid.

SECTION FIFTEEN PAGES 33 - 34

A detailed look at the colour grading of diamonds. What does the term "blue-white" mean? What causes a diamond to have a yellowish tinge? 

SECTION SIXTEEN PAGES 34 - 38

A detailed look at the cutting grades of diamonds. The girdle surface.

Minor symmetry Faults. The culet. The quality of the polish. The proportions of diamonds. Why a diamond displays high brilliancy and fire. Table reflections in the pavilion and how you can determine the cutting grade by viewing these table reflections.

SECTION SEVENTEEN PAGES 38 - 39

The terminology for the different cutting grades. How to classify a diamond into the right cutting grade. 

SECTION EIGHTEEN PAGES 39 -41

Proportion judgement with respect to fancy cut diamonds. The length to width ratios that are recommended for fancy cut diamonds. 

SECTION NINETEEN PAGES 41 - 44

A complete examination of the external and internal features of diamonds. Possible hazards that may arise from certain blemishes or features. Inclusion reflections that occur in diamonds. Tweezer reflections. 

SECTION TWENTY PAGES 44 - 45

Laser drilled diamonds. Yehuda Filled or Koss enhanced diamonds. Irradiated diamonds. 

SECTION TWENTY-ONE PAGES 45 - 50

Summarizing the Important Notes of Caution. The "bow-tie" effect.

All the formulae summarized for all your diamond calculations.
 

SECTION TWENTY-TWO PAGES 51 - 52

The long term care of your ring. The proper procedures to take when leaving your ring in for servicing. How to protect yourself at all times. 

DIAGRAM OF THE IDEAL AMERICAN CUT PAGE SUPP. 1

LASER GEMPRINT INFORMATION SHEET PAGE SUPP. 2

LIST OF INSURANCE COMPANIES THAT GIVE A DISCOUNT ON YOUR INSURANCE IF YOU HAVE LASER GEMPRINTING PAGE SUPP. 3

PERSONAL SHOPPING CHARTS TO HELP YOU PURCHASE A DIAMOND SUPP. 4 


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