Simon & Schuster's Guide to Gems and Precious Stones

Simon & Schuster's Guide to Gems and Precious Stones

Edited By: Kennie Lyman
Simon & Schuster's Guide to Gems and Precious Stones provides both the connoisseur and the casual collector with a compact, easy-to-use volume describing more than 100 rare varieties of minerals whose beauty and mystery have possessed our imaginations from time immemorial. More than 450 brilliant photographs accompany profiles of each gem, covering such aspects as appearance, physical properties -- density, hardness, refraction -- occurrence, and how to judge quality and value. Additional sections describe the process of cutting gemstones and the techniques professional gemologists use to evaluate a stone's weight and optical properties.
Detailed and comprehensive, this book is essential for anyone interested in the study of gems and precious stones.
Choose a format:
  • Touchstone | 
  • 384 pages | 
  • ISBN 9780671604301 | 
  • March 1986
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Chapter 1

1 DIAMOND

C

Native carbon. The same element also occurs naturally in the form of graphite, another mineral with completely different characteristics and appearance.

Its name comes from the Greek adámas, meaning "invincible," in recognition of its exceptional hardness, which makes it resist any form of abrasion by other minerals.

Crystal system Cubic.

Appearance Diamonds most commonly occur as isolated crystals, which may be in the form of a more or less perfect octahedron, an octahedron with curved faces, or sometimes an icositetrahedron or hexoctahedron, which... see more

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