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Gemology
- What is Gemology?
- Precious and Semiprecious
- The Main Factors For Durability
  - Hardness
  - Toughness
  - Stability
  - Specific Gravity
    - Specific Gravity - Direct Weighing Method
    - Specific Gravity - Heavy Liquids
  - Table of Hardness, Specific Gravity, Refraction Index of Gemstones
  - The Significance of Durability
- Optic's
  - Reflection and Refraction
  - Luster
  - Brilliancy & Dispersion
- Color of Gemstones
  - Structure of Color Gemstones
  - Effects of Acids on Gemstones
  - Causes of Color in Gemstones
  - Change and Loss of Color in Gemstones
  - The Nature of Inclusions in Gemstones
  - Elements in the Important Gemstones
- Star Gemstones
  - Star Resulting From Selective Absorption
  - Star Phenomena From Interference Light
  - Distinguishing Star Gemstones
- Physical Properties of Gemstones
- Crystallography & Forms of Gems
  - The Nature of Minerals
  - The Formation of Crystals
  - The External Form of Crystals
  - Outward Appearance Of Crystalline Material
  - Distorted and Deformed Crystals and Pseudomorphs
  - Crystal Systems
- Gemstones Cutting
  - Importance of Cutting in Gemstones
  - Classifying Cutting Styles
  - Principal Cutting Styles
  - Cutting and Polishing Colored Stones
  - Carved and Engraved Gemstones
  - Gemst Nature of Inclusions in Gemstones
  - Elements in the Important Gemstones
- Star Gemstones
  - Star Resulting From Selective Absorption
  - Star Phenomena From Interference Light
  - Distinguishing Star Gemstones
- Physical Properties of Gemstones
- Crystallography & Forms of Gems
  - The Nature of Minerals
  - The Formation of Crystals
  - The External Form of Crystals
  - Outward Appearance Of Crystalline Material
  - Distorted and Deformed Crystals and Pseudomorphs
  - Crystal Systems
- Gemstones Cutting
  - Importance of Cutting in Gemstones
  - Classifying Cutting Styles
  - Principal Cutting Styles
  - Cutting and Polishing Colored Stones
  - Carved and Engraved Gemstones
  - Gemstones Grading and Vaones Grading and Va Nature of Inclusions in Gemstones
  - Elements in the Important Gemstones
- Star Gemstones
  - Star Resulting From Selective Absorption
  - Star Phenomena From Interference Light
  - Distinguishing Star Gemstones
- Physical Properties of Gemstones
- Crystallography & Forms of Gems
  - The Nature of Minerals
  - The Formation of Crystals
  - The External Form of Crystals
  - Outward Appearance Of Crystalline Material
  - Distorted and Deformed Crystals and Pseudomorphs
  - Crystal Systems
- Gemstones Cutting
  - Importance of Cutting in Gemstones
  - Classifying Cutting Styles
  - Principal Cutting Styles
  - Cutting and Polishing Colored Stones
  - Carved and Engraved Gemstones
  - Gemst Nature of Inclusions in Gemstones
  - Elements in the Important Gemstones
- Star Gemstones
  - Star Resulting From Selective Absorption
  - Star Phenomena From Interference Light
  - Distinguishing Star Gemstones
- Physical Properties of Gemstones
- Crystallography & Forms of Gems
  - The Nature of Minerals
  - The Formation of Crystals
  - The External Form of Crystals
  - Outward Appearance Of Crystalline Material
  - Distorted and Deformed Crystals and Pseudomorphs
  - Crystal Systems
- Gemstones Cutting
  - Importance of Cutting in Gemstones
  - Classifying Cutting Styles
  - Principal Cutting Styles
  - Cutting and Polishing Colored Stones
  - Carved and Engraved Gemstones
  - Gemstones Grading and Va
    
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    This work is licensed by Colored Gemstone Guide under a Creative Commons Attribution 3.0 Unported License.

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