Muutke küpsiste eelistusi

Diamond Handbook: How to Identify & Evaluate Diamonds [Pehme köide]

  • Formaat: Paperback / softback, 168 pages, kõrgus x laius: 230x155 mm, kaal: 374 g, Illustrations
  • Ilmumisaeg: 20-Feb-2018
  • Kirjastus: International Jewelry Publications,U.S.
  • ISBN-10: 0929975537
  • ISBN-13: 9780929975535
  • Formaat: Paperback / softback, 168 pages, kõrgus x laius: 230x155 mm, kaal: 374 g, Illustrations
  • Ilmumisaeg: 20-Feb-2018
  • Kirjastus: International Jewelry Publications,U.S.
  • ISBN-10: 0929975537
  • ISBN-13: 9780929975535
Newman, a gemologist and author of guides on gems and jewelry, illustrates how to identify and evaluate diamonds. She explains basic facts about diamonds; diamond price factors; judging the cut of fancy shapes, including face-up brilliance and excess weight, proportions of the standard round brilliant style, finish, and light performance; clarity grades; diamond treatments; branded diamonds; and other topics. This edition adds a chapter on how to distinguish transparent and black diamond imitations from real natural diamonds; expands the chapter on synthetic diamonds, with new photo pages to identify HPHT (high pressure and high temperature) and CVD (chemical vapor deposition)-grown diamonds with magnification, fluorescence, and crossed Polaroid filters; and updated photos and information on chapters on fancy colored diamonds, antique cuts and jewelry, fluorescence, treatments, and recutting diamonds. Annotation ©2018 Ringgold, Inc., Portland, OR (protoview.com)

The Diamond Handbook: 3rd Edition updates jewelry professionals and serious diamond buyers on new developments in diamond grading, treatments, synthetic diamonds, imitations, branded diamonds and fancy-color diamonds. Using close-up photos, it shows how to make visual judgments about clarity, transparency, brilliance and cut quality. As the Journal of Gemmology has stated in its review of the previous edition, the Diamond Handbook “gives the trade reader virtually all the essential information needed to buy and sell diamonds.” A chapter on how to distinguish transparent and black diamond imitations from real natural diamonds has been added. The chapter on synthetic diamonds has eleven new pages, seven of which are photo pages that help trade members identify HPHT- and CVD-grown diamonds with magnification, fluorescence and crossed Polaroid filters. Photos and information have been updated in the chapters on fancy color diamonds, antique cuts and jewelry, diamond fluorescence, diamond treatments and recutting diamonds. A review in Gems & Gemology described the previous edition of the Diamond Handbook as “an entire course on judging diamonds . . . useful to both the jewelry industry and consumers.”

An advanced, full-color guide to identifying and evaluating diamonds including information on diamond treatments, synthetic diamonds, imitation diamonds, diamond recutting, branded diamonds, antique jewelry, fluorescence, light performance, and fancy color diamonds.
Acknowledgments
1 Basic Facts about Diamonds
7(7)
What is a Diamond?
7(1)
How are Diamonds Formed?
7(1)
Where are Diamonds Found?
8(1)
A Closer Look at Diamond's Remarkable Properties
8(3)
What Type of Magnification is Used to View Diamonds?
11(1)
Which Type of Lighting is Best for Viewing Diamonds?
12(1)
Other Tips on Viewing Diamonds
13(1)
2 Diamond Price Factors
14(17)
Why the 4 C's is No Longer an Adequate Pricing System
14(1)
Price Factors Explained
14(17)
Color
14(3)
Carat Weight
17(1)
Cut Quality
18(1)
Cutting Style & Stone Shape
19(2)
Clarity
21(5)
Transparency
26(3)
Treatment Status
29(2)
3 Judging the Cut of Fancy Shapes
31(7)
Judging Cut Quality
32(1)
Bow Ties and Other Dark Patterns
33(1)
Windows
34(2)
Excess Diamond Weight
36(2)
4 Judging Cut (Round Brilliants)
38(14)
Pavilion
38(2)
Crown
40(2)
Table
42(2)
Girdle
44(2)
Culet
46(1)
Star Facet Length %
46(1)
Lower Girdle Facet Percentage
46(1)
Symmetry
46(2)
Polish
48(1)
"Ideal-Cut Diamonds"
48(1)
Light Performance
49(1)
Tips on Evaluating Light Performance Visually
49(3)
5 A Closer Look at Clarity
52(9)
Clarity Grades
52(3)
Diamond Clarity Examples
55(6)
6 Fluorescence
61(6)
Are Fluorescent Diamonds Undesirable?
64(3)
7 Synthetic Diamonds
67(21)
What are Synthetic Diamonds?
67(1)
How Does Growing Diamonds Differ from Culturing Pearls?
67(1)
Diamond Types
68(2)
Detecting Synthetic Diamonds
70(14)
Magnification
70(5)
Magnetism
75(1)
Fluorescence
75(1)
Phosphorescence
76(5)
Appearance Between Crossed Polaroid filters
81(3)
Advanced Methods for Identifying Synthetic Diamonds
84(4)
Diamond Verification Instruments
86(2)
8 Diamond Treatments
88(14)
Methods for Changing Diamond Color
89(7)
Foil backing
89(1)
Coating
89(2)
Irradiation
91(2)
Annealing
93(1)
High Pressure High Temperature HPHT Heat Treatment
93(3)
High Temperature Heat Treatment
96(1)
Methods for Improving Clarity
96(6)
Laser Drilling
96(2)
Fracture Filling
98(4)
9 Diamond or Imitation?
102(9)
Detecting Transparent Diamond Imitations
102(5)
Distinguishing Black Diamonds from Other Black Stones
107(4)
10 Judging Fancy Colored Diamonds
111(10)
Fancy Colored Diamond Rarity
119(2)
11 Antique Cuts & Jewelry
121(19)
The History of Diamond Cuts
121(8)
Pricing Antique Diamonds
129(1)
Period Jewelry (European & American)
130(1)
Jewelry Periods
131(9)
12 Branded Diamonds
140(8)
13 Recutting Diamonds
148(6)
How do Cutters Modify Diamond Color?
151(1)
Getting Diamond(s) Recut
151(3)
Glossary 154(5)
Chemical, Physical & Optical Characteristics of Diamonds 159(3)
Bibliography 162(3)
Index 165