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. |
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Page 112
... chrysocolla , Holley and Mojave blue agate , carnelian , and chrysoprase are increasingly in demand for jewelry . There is a very good reason for this upward spike . New sources of ... Chrysocolla Gem Chrysocolla is in high demand in the.
... chrysocolla , Holley and Mojave blue agate , carnelian , and chrysoprase are increasingly in demand for jewelry . There is a very good reason for this upward spike . New sources of ... Chrysocolla Gem Chrysocolla is in high demand in the.
Page 113
... chrysocolla , gem silica , agated - chrysocolla , and gem chrysocolla . The issue lies with the term chrysocolla . True chrysocolla is a soft , noncrystalline mineral that owes its vivid color , ranging from turquoise to sky blue , to ...
... chrysocolla , gem silica , agated - chrysocolla , and gem chrysocolla . The issue lies with the term chrysocolla . True chrysocolla is a soft , noncrystalline mineral that owes its vivid color , ranging from turquoise to sky blue , to ...
Page 114
... chrysocolla . The gem exhibits a highly saturated blue primary hue of sixty percent tone . Carving by award - winning gem sculptor Glenn Lehrer . Of all the so - called jaspers none were so. to ... chrysocolla juxtaposed. 114 GEM CHRYSOCOLLA.
... chrysocolla . The gem exhibits a highly saturated blue primary hue of sixty percent tone . Carving by award - winning gem sculptor Glenn Lehrer . Of all the so - called jaspers none were so. to ... chrysocolla juxtaposed. 114 GEM CHRYSOCOLLA.
Contents
PART II | 10 |
The Geometry of beauty | 22 |
Secrets of the trade | 37 |
Copyright | |
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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