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Author: P.C. Keller
Publisher: Springer Science & Business Media
ISBN: 1468466747
Category : Science
Languages : en
Pages : 315
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Book Description
Each gem deposit-whether of primary origin in the parent rocks; or secondary as alluvial placers in valley floors, river gravels, or the sand of oceanic shelves presents an eloquent chronicle of the Earth's life story. It reveals to the expert the prodigious processes which formed the present crust of our planet, of which this volume discloses a small but exciting detail. The materials of the Earth's crust are the rocks. In this book, the author expounds on how they were formed, why they altered, why they became the cradles of precious gemstones, how they are categorized, and how they are now exploited by man. What initiates the growth of gemstones? How do they crystallize? Why do gemstones of the same species, originating from different sources, vary? What causes the occurrence of varieties? Why do diamonds, unlike other precious stones, occur not near the Earth's surface in its crust, but deep down beneath it in the upper mantle? These are only a few of the entrancing subjects discussed in this enlightening volume. The reader learns that the Earth is surprisingly alive and altering constantly-sometimes through slow and equable changes and at times by violent and tremendous cataclysms, events from which gemstones issue.
Author: P.C. Keller
Publisher: Springer Science & Business Media
ISBN: 1468466747
Category : Science
Languages : en
Pages : 315
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Book Description
Each gem deposit-whether of primary origin in the parent rocks; or secondary as alluvial placers in valley floors, river gravels, or the sand of oceanic shelves presents an eloquent chronicle of the Earth's life story. It reveals to the expert the prodigious processes which formed the present crust of our planet, of which this volume discloses a small but exciting detail. The materials of the Earth's crust are the rocks. In this book, the author expounds on how they were formed, why they altered, why they became the cradles of precious gemstones, how they are categorized, and how they are now exploited by man. What initiates the growth of gemstones? How do they crystallize? Why do gemstones of the same species, originating from different sources, vary? What causes the occurrence of varieties? Why do diamonds, unlike other precious stones, occur not near the Earth's surface in its crust, but deep down beneath it in the upper mantle? These are only a few of the entrancing subjects discussed in this enlightening volume. The reader learns that the Earth is surprisingly alive and altering constantly-sometimes through slow and equable changes and at times by violent and tremendous cataclysms, events from which gemstones issue.
Author: George John Younghusband
Publisher:
ISBN:
Category : Crown jewels
Languages : en
Pages : 184
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Book Description
Author: George Frederick Kunz
Publisher:
ISBN:
Category : Gems
Languages : en
Pages : 554
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Book Description
Author: Aḥmad ibn Yūsuf Tīfāshī
Publisher: Scarecrow Press
ISBN: 9780810832947
Category : Crafts & Hobbies
Languages : en
Pages : 298
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Book Description
Samar Najm Abul Huda's translation of Ahmad ibn Yusuf al Tifaschi's study of gems. Born in 1184, Al Tifaschi first learned about gems from his father, and augmented his knowledge through readings of Aristotle, Theophrastus, and Pliny, as well as through extensive travels to mines and trading centers. In 1253, he wrote what later became known as the most 'methodical and complete' work on precious stones. Gemologists of today are still astounded by the advanced observations that Al Tifaschi made in this work.
Author: Bruce G. Knuth
Publisher:
ISBN: 9780964355040
Category : Gems
Languages : en
Pages : 0
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Book Description
This comprehensive modern lapidary features gemological, historical, and metaphysical information about forty-six gems. Thousands of beliefs and uses have been collected and chronicled. 115 illustrations enhance this 5 1/2 x 8 1/2 reference. Folklore gathered from numerous cultures is given for each stone. Included is a new translation of Mandeville's fourteenth century Le Lapidaire, and hundreds of quotations from literature. All references to gems in the Bible, the Koran, Shakespeare's plays and poems, and the works of Chaucer, Emerson, Thomas Moore, and Sir Walter Scott are given. A translation of Marbode's eleventh century gem treatise is included, as well as references from Vedic texts. Additional features: crystal shapes and classifying gems, a history of gem literature, and a chapter on birthstones, planetary, and Apostolic stones. Gems in Myth, Legend, and Lore Revised Edition continues a tradition of gem literature spanning over two thousand years.
Author: Robin Hansen
Publisher: Princeton University Press
ISBN: 0691214484
Category : Nature
Languages : en
Pages : 241
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Book Description
Originally published: London: Natural History Museum, 2022, as: The Natural History Museum book of gemstones: a concise reference guide.
Author: Eduard Josef Gübelin
Publisher:
ISBN: 9783039990290
Category : Crystals
Languages : en
Pages : 829
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Book Description
Author: Athena Perrakis
Publisher: Fair Winds Press
ISBN: 1592338410
Category : Body, Mind & Spirit
Languages : en
Pages : 195
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Book Description
To access the power of crystals, you must know their stories. Crystal Lore, Legends & Myths presents these fascinating histories and legends of the world's crystals. Crystals, gems, and semi-precious stones have long been sought for their beauty, power, and utility. Historically used as adornments, currency, talismans, and amulets, crystals have been reputed through the ages to bestow magic and power on the user. However, in order to fully harness each stone’s unique power, one must know the unique legends and lore attached to it. Every stone has a narrative or key that unlocks its power. Oftentimes, these legends have been lost—or even deliberately altered—to confuse and obscure. In Crystal Lore, Legends & Myths, leading crystal expert and metaphysical teacher Athena Perrakis presents the fascinating history of the world’s most powerful stones. This comprehensive collection of stones presents to you the legends and relics from different cultures and ancient civilizations, including Lemuria, Sumeria, Egypt and Atlantis, among others. Learn the fascinating stories of how gems and minerals were used to raise power, store wisdom and secret teachings, and give incredible healing—and tap into the powers of the crystals yourself!
Author: Julius Wodiska
Publisher:
ISBN:
Category : Precious stones
Languages : en
Pages : 482
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Book Description
Author: David P. Turner
Publisher: John Wiley & Sons
ISBN: 1119299853
Category : Science
Languages : en
Pages : 292
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Book Description
Understanding gemstones in a geological context Gemstones are colorful treasures of the Earth that have captivated humans for thousands of years. The physical and chemical characteristics of each type of gem provide insights into the geological processes that created them. Geology and Mineralogy of Gemstones is a textbook aimed at upper-level undergraduate and graduate students. It presents the basic mineralogical and geological knowledge needed to understand gemstones and examines the characteristics and geological origins of different types of gemstone. Volume highlights include: Concepts in mineralogy Structure and chemical composition of minerals Geological processes that lead to the formation and movement of gemstones Equipment and tools used to examine gemstones and their physical properties The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity. Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals.
