Sec. III Ch. 26: Agate

• Preface & Contents
• Sec. I Sec. I Ch. 1: Definition of Gems
• Sec. I Ch. 2: Classification Minerals
• Sec. I Ch. 3: Origin of Gems
• Sec. I Ch. 4: Plato on Gems
• Sec. I Ch. 6: Clarity of Gems
• Sec. I Ch. 7: Transparency of Gems
• Sec. I Ch. 8: Color of Gems
• Sec. I Ch. 9: Hardness of Gems
• Sec. I Ch. 11: Gemstone Treatments
• Sec. I Ch. 12: Maximizing Gemstone Size
• Sec. I Ch. 13: Foils and Imitations
• Sec. I Ch. 15: Coloring of Gems
• Sec. I Ch. 17: Synthetic Gems
• Sec. I Ch. 18: Gem Engraving
• Sec. I Ch. 19: Faculties of Gems
• Sec. I Ch. 20: Special Effects of Gems
• Sec. I Ch. 21: Langius on Gems
• Sec. I Ch. 22: Untrue Supernatural Effects
• Sec. I Ch. 23: Physical Origin Properties
• Sec. I Ch. 24: Measuring Gem Properties
• Sec. I Ch. 25: Condition Physical Properties
• Sec. II Ch. 1: Classification of Gems
• Sec. III Ch. 1: Lapidary Diamond
• Sec. III Ch. 2: Carbuncle of Ruby
• Sec. III Ch. 3: Balassius or Palatius
• Sec. III Ch. 5: Garnets
• Sec. III Ch. 7: Hyacinth
• Sec. III Ch. 8: Amethyst
• Sec. III Ch. 9: Pearl
• Sec. III Ch. 10: Sapphire
• Sec. III Ch. 11: Opal
• Sec. III Ch. 12: Emerald
• Sec. III Ch. 13: Chrysoprase, Prasius, Smaragdite
• Sec. III Ch. 14: Chrysoprase
• Sec. III Ch. 15: Smaragdo-Prasius
• Sec. III Ch. 16: Chrysolite or Topaz
• Sec. III Ch. 17: Topaz or Chrysolite
• Sec. III Ch. 18: Beryl
• Sec. III Ch. 19: Crystal and Pseudo-Diamond
• Sec. III Ch. 20: Asteria Gemma Solis
• Sec. III Ch. 21: Oculus Cati
• Sec. III Ch. 22: Sardius or Cornelian
• Sec. III Ch. 23: Sardonyx or Cameus
• Sec. III Ch. 24: Chalcedony
• Sec. III Ch. 25: Onyx
• Sec. III Ch. 26: Agate
• Sec. III Ch. 28: Jasper
• Sec. III Ch. 29: Heliotrope
• Sec. III Ch. 30: Lapis Nephriticus
• Sec. III Ch. 31: Malachite
• Sec. III Ch. 32: Turky Stone
• Sec. III Ch. 33: Lapis Lazuli
• Sec. III Ch. 34: Lapis Armenus
• Sec. III Ch. 35: Astroites or Starre Stone
• Sec. III Ch. 36: Toadstone
• Sec. III Ch. 37: Coral
• Sec. III Ch. 38: Amber
• Sec. III Ch. 39: Gagates
• Sec. III Ch. 40: Coal
• Sec. III Ch. 41-89: Opaque Stones

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Deposits Diamond Gemological Properties Gemstones Gold History Mine Mining Production USA

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