Onyx Formation explores the fascinating geological processes behind the creation of onyx, a prized gemstone known for its striking banded patterns.
This book delves into the earth science behind chalcedony deposits, explaining how specific conditions like changes in p H and temperature lead to the layering and coloration characteristic of onyx.
Readers will discover how the gemstone’s unique look results from cyclical deposition and chemical alteration within silica-rich solutions, offering a deeper understanding of mineral deposition and alteration.
The book begins with an introduction to the mineralogy of chalcedony and related silica minerals, progressing to the genesis of layered deposits through diffusion and rhythmic crystallization.
Extensive chapters explore the chemical alterations, particularly the introduction of iron and carbonaceous materials, responsible for onyx’s signature black and white colors.
By integrating geological observations with chemical analyses and experimental results, Onyx Formation provides a comprehensive, multidisciplinary view, making it a valuable resource for craft enthusiasts, earth science students, and anyone interested in the science of gemology and jewelry making.
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