ISBN: 9798194975600 - the ultimate guide to turquoise (the ultimate guide to gemstones) (6 resultados)

Paperback. Condición: new. Paperback. Turquoise is one of the oldest gemstones known to humanity, yet it is also one of the most misunderstood.For thousands of years, turquoise has been mined, traded, worn, carved, collected, and treasured across Egypt, Persia, Central Asia, China, Tibet, the Americas, and the American Southwest. Its unmistakable blue and green colors have appeared in royal ornaments, ancient burial goods, religious objects, Native American jewelry, and some of the most recognizable gemstone designs in the world.But the modern turquoise market is complicated.What separates valuable natural turquoise from stabilized material? Why does turquoise from one mine command dramatically more than visually similar material from another? What exactly is spiderweb matrix? How can dyed howlite, magnesite, reconstructed turquoise, block material, and other imitations be recognized? And when does a famous mine name genuinely add value?This book provides a practical and detailed introduction to turquoise from both a gemological and collecting perspective.Beginning with the mineral itself, it explains how turquoise forms, why copper produces its characteristic blue color, why some material turns green, how matrix develops, and why certain geological environments produce much harder and denser turquoise than others.It then explores the major turquoise-producing regions of the world, including historic Persian and Nishapur turquoise, the Sinai Peninsula, China, Tibet, Mexico, Central Asia, and the famous turquoise deposits of the United States. Particular attention is given to American turquoise, including Arizona, Nevada, New Mexico, Sleeping Beauty, and Kingman.The historical chapters follow turquoise through ancient Egypt, Persian culture, the Silk Road, Tibet, China, pre-Columbian civilizations, and Native American traditions of the Southwest.The book also examines one of the most important subjects for modern buyers: the difference between natural, treated, synthetic, reconstructed, composite, and imitation turquoise. Stabilization, impregnation, waxing, dyeing, block turquoise, synthetic turquoise, dyed howlite, dyed magnesite, glass, plastic, and ceramic substitutes are explained clearly, along with their effects on durability and value.Readers will also learn how turquoise is examined and tested using visual observation, magnification, hardness, specific gravity, refractive index, spectroscopy, and advanced laboratory techniques. Common identification mistakes are addressed, including the dangers of relying on color, matrix, mine appearance, or destructive home tests.For collectors and buyers, the book explains how turquoise quality and value are actually assessed. Color, saturation, density, matrix, treatment, size, cutting, mine origin, provenance, rarity, and market demand are considered separately, avoiding the unreliable AAA-style grading systems commonly encountered online.It also looks at turquoise as a collectible asset: how to buy loose stones, rough, beads, and jewelry; how to evaluate old-stock and closed-mine material; how to document a collection; when laboratory testing is worthwhile; and why provenance can become as important as the stone itself.Finally, the book covers cutting, setting, jewelry use, cleaning, storage, restoration, and the changing future of the turquoise market as famous deposits become scarcer and treatments and imitations become increasingly sophisticated.Whether you are a gemstone collector, jeweler, lapidary, antique enthusiast, mineral collector, or simply want to understand what you are actually buying, this book provides a complete foundation for appreciating turquoise beyond its color.Turquoise is not simply a blue stone. It is a mineral shaped by geology, transformed by craftsmanship, carried across ancient tra Shipping may be from multiple locations in the US or from the UK, depending on stock availability.…

Taschenbuch. Condición: Neu. Neuware.

Paperback. Condición: new. Paperback. Turquoise is one of the oldest gemstones known to humanity, yet it is also one of the most misunderstood.For thousands of years, turquoise has been mined, traded, worn, carved, collected, and treasured across Egypt, Persia, Central Asia, China, Tibet, the Americas, and the American Southwest. Its unmistakable blue and green colors have appeared in royal ornaments, ancient burial goods, religious objects, Native American jewelry, and some of the most recognizable gemstone designs in the world.But the modern turquoise market is complicated.What separates valuable natural turquoise from stabilized material? Why does turquoise from one mine command dramatically more than visually similar material from another? What exactly is spiderweb matrix? How can dyed howlite, magnesite, reconstructed turquoise, block material, and other imitations be recognized? And when does a famous mine name genuinely add value?This book provides a practical and detailed introduction to turquoise from both a gemological and collecting perspective.Beginning with the mineral itself, it explains how turquoise forms, why copper produces its characteristic blue color, why some material turns green, how matrix develops, and why certain geological environments produce much harder and denser turquoise than others.It then explores the major turquoise-producing regions of the world, including historic Persian and Nishapur turquoise, the Sinai Peninsula, China, Tibet, Mexico, Central Asia, and the famous turquoise deposits of the United States. Particular attention is given to American turquoise, including Arizona, Nevada, New Mexico, Sleeping Beauty, and Kingman.The historical chapters follow turquoise through ancient Egypt, Persian culture, the Silk Road, Tibet, China, pre-Columbian civilizations, and Native American traditions of the Southwest.The book also examines one of the most important subjects for modern buyers: the difference between natural, treated, synthetic, reconstructed, composite, and imitation turquoise. Stabilization, impregnation, waxing, dyeing, block turquoise, synthetic turquoise, dyed howlite, dyed magnesite, glass, plastic, and ceramic substitutes are explained clearly, along with their effects on durability and value.Readers will also learn how turquoise is examined and tested using visual observation, magnification, hardness, specific gravity, refractive index, spectroscopy, and advanced laboratory techniques. Common identification mistakes are addressed, including the dangers of relying on color, matrix, mine appearance, or destructive home tests.For collectors and buyers, the book explains how turquoise quality and value are actually assessed. Color, saturation, density, matrix, treatment, size, cutting, mine origin, provenance, rarity, and market demand are considered separately, avoiding the unreliable AAA-style grading systems commonly encountered online.It also looks at turquoise as a collectible asset: how to buy loose stones, rough, beads, and jewelry; how to evaluate old-stock and closed-mine material; how to document a collection; when laboratory testing is worthwhile; and why provenance can become as important as the stone itself.Finally, the book covers cutting, setting, jewelry use, cleaning, storage, restoration, and the changing future of the turquoise market as famous deposits become scarcer and treatments and imitations become increasingly sophisticated.Whether you are a gemstone collector, jeweler, lapidary, antique enthusiast, mineral collector, or simply want to understand what you are actually buying, this book provides a complete foundation for appreciating turquoise beyond its color.Turquoise is not simply a blue stone. It is a mineral shaped by geology, transformed by craftsmanship, carried acros Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability.…

Condición: New. Print on Demand.

PAP. Condición: New. New Book. Shipped from UK. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000.

PAP. Condición: New. New Book. Delivered from our UK warehouse in 4 to 14 business days. THIS BOOK IS PRINTED ON DEMAND. Established seller since 2000.