Secrets of the Gem Trade: The Connoisseur's Guide to Precious GemstonesAs the sub-title suggests, this is the consumer's guide to precious gemstones. Divided into two parts: In plain non-technical language, Part I redefines preciousness and gently guides the reader toward a real understanding of those criteria that make a gemstone. Part II contains a series of individual essays that apply the criteria of connoisseurship to 35 of today's most important gemstones. The book covers precious stones old and new including diamond, pearl, tourmaline, sapphire, chalcedony, spinel, ruby, and garnet. |
From inside the book
Results 1-3 of 63
Page 107
... emerald is undoubtedly precious , it is certainly not among the new precious stones . Before the discovery of emerald in Colombia in the sixteenth century , the green variety of corundum was called oriental emerald . The only source of ...
... emerald is undoubtedly precious , it is certainly not among the new precious stones . Before the discovery of emerald in Colombia in the sixteenth century , the green variety of corundum was called oriental emerald . The only source of ...
Page 108
... emerald. emerald.114 About three years ago a new source was discovered in an area near Muzo called La Pita . Stones from this source are almost impossible to separate from Muzo stones . 115 ... emeralds cut in the traditional step or EMERALD.
... emerald. emerald.114 About three years ago a new source was discovered in an area near Muzo called La Pita . Stones from this source are almost impossible to separate from Muzo stones . 115 ... emeralds cut in the traditional step or EMERALD.
Page 109
... emeralds cut in the traditional step or emerald cut . This cut has seventeen long , narrow , steplike facets . A majority of emeralds are cut in this style , both because it accentuates the warm satiny hue of the gem and , by happy ...
... emeralds cut in the traditional step or emerald cut . This cut has seventeen long , narrow , steplike facets . A majority of emeralds are cut in this style , both because it accentuates the warm satiny hue of the gem and , by happy ...
Contents
PART II | 10 |
The Geometry of beauty | 22 |
Secrets of the trade | 37 |
Copyright | |
43 other sections not shown
Other editions - View all
Secrets of the Gem Trade: The Connoisseur's Guide to Precious Gemstones Richard W. Wise No preview available - 2016 |
Secrets of the Gem Trade: The Connoisseur's Guide to Precious Gemstones Richard W. Wise No preview available - 2006 |
Common terms and phrases
aficionado agate alexandrite amethyst appear aquamarine beauty blue diamonds blue sapphire bluish body color Brazilian brilliance brown brownish Burma cabochon carat carnelian cat's-eye chalcedony chrysocolla chrysoprase clarity grade collector color grade colored gemstones colored stones colorless diamonds connoisseur connoisseurship courtesy crystal cultured pearls dark daylight dealers described diamond color diamond grading eighty percent emerald evaluation exhibit face-up faceted fancy color diamonds finest fluorescent freshwater pearls garnet gem varieties Gemological Gemological Institute gemologist Gems & Gemology gemstones GIA-GTL grading reports incandescent light Jeff Scovil key color lapidary lapis lighting environment luster multicolor effect nacre normally opal orange padparadscha Paraiba parcel percent tone pinkish precious primary hue purple purplish rare refractive refractive index saturation and tone saturation modifier secondary hue South Sea pearls specific spessartite spinel Stephen Hofer tanzanite term tonal topaz tourmaline translucent transparency tsavorite visible inclusions visually pure vivid yellow yellowish