r and popular gemstones, minerals and crystals through photos and descriptions of color variety, luster and transparency range. Scientific and metaphysical properties of each gemstone plus significant meanings or historical uses, or how it is formed.
Topics covered include:

• 135 Gemstones, Crystals and Minerals
• Color - Details & Variations
• Elemental Composition
• Crystal Structure
• Hardness & Specific Gravity
• Luster
• Transparency
• Metaphysical Properties
• Other Facts:
• Historical Uses or Meanings
• Current or Historical Metaphysical Uses
• Also Known As - If Relevant
• Birthstone

Suggested uses:

• Buying Guide - identify metaphysical or historical uses of stones for you personally or as a meaningful gift
• Collectors - handy identification and properties reference
• Jewelry & Art - know the structure and durability of your materials for mounting or carving