Table Of Contents

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In this TOC (Table Of Content) you will find pages that have been published presented in blue and pages that yet need to be written presented in red. For better navigation, we list the pages in 3 categories:

  1. Theory - Basic and in-depth mechanisms involved in gemology
  2. Practical - Descriptions of instruments, techniques and other practical discussions
  3. Gemstones - Information about the gemstone at hand

For the neophyte who wants to study gemology from scratch, it is best to start in that order as some words and principles introduced in the theory pages will need to be understood first. At the very least, one should learn the theory in the "basic" sections of the pages.

We never said it was going to be easy.


Theory Practical Gemstones
Content
  1. Introduction to Gemology
    1. Education
    2. An Historical Look at our Obsession with Gems
    3. Glossary of Terms
  2. Origins of minerals
    1. Igneous rocks
    2. Sedimentary rocks
    3. Metamorphic rocks
  3. The Chemistry of Gemstones
    1. Isomorphous replacement
    2. The Chemical Classification of Gems & Minerals
  4. Crystallography
    1. Crystal Systems
    2. Form
    3. Habit
    4. Symmetry
    5. Twinning
  5. Cleavage
  6. Optical properties of gemstones
    1. Nature of light
      1. The electromagnetic wave theory
      2. The quantum theory
      3. The electromagnetic spectrum
    2. Reflection effects
      1. Luster
      2. Sheen
        1. Chatoyancy
        2. Asterism
        3. Iridescence
      3. Brilliance (Total Internal Reflection)
    3. Polarization
    4. Pleochroism
    5. Color
    6. Refraction
      1. Double Refraction
    7. Dispersion
    8. Diffraction
    9. Interference
    10. Luminescence
      1. Fluorescence
      2. Phosphorescence
      3. Tenebrescence
      4. Triboluminescence
  7. Hardness
  8. Specific Gravity
  9. Basic math for gemology
    1. Cross-multiplication
    2. Sine, cosine and tangent
    3. Degrees, minutes and seconds
Content
  1. Equipment used to identify gemstones
    1. 10x Loupe
    2. Spectroscope
    3. Refractometer
    4. Polariscope
    5. Dichroscope
    6. Immersion Cell
    7. Color Filters
    8. Microscope
    9. Hydrostatic Balance
    10. Heavy Liquids
    11. Hardness pencils
  2. Inclusions
  3. Synthetic gemstones
  4. Visual Optics
    1. The Hodgkinson Method
Content (all under construction)
  1. Diamond
  2. Corundum
    1. Ruby
    2. Sapphire
  3. Beryl
    1. Aquamarine
    2. Bixbite
    3. Emerald
      1. Vanadium Beryl
    4. Goshenite
    5. Green Beryl
    6. Heliodor
    7. Maxixe
    8. Morganite
    9. Riesling
    10. True Blue
    11. Pezzottaite (Beryl Group)
  4. Quartz
    1. Amethyst
    2. Ametrine
    3. Citrine
    4. Prasiolite
    5. Rock Crystal
    6. Rose Quartz
    7. Smokey Quartz
  5. Quartz - Microcrystalline
    1. Chalcedony
      1. Agate
      2. Bloodstone
      3. Carnelian
      4. Chrysoprase
      5. Jasper
      6. Onyx
      7. Sard
      8. Sardonyx
      9. Tigereye
  6. Zoisite
    1. Tanzanite
    2. Thulite
  7. Garnet
    1. Almandine
    2. Andradite
      1. Demantoid
    3. Grossular
      1. Hydrogrossular
      2. Tsavorite
    4. Pyrope
    5. Spessartite
    6. Uvarovite
  8. Diopside
    1. Chrome Diopside
    2. Tashmarine
  9. Feldspar
    1. Amazonite
    2. Andesine
    3. Labradorite
    4. Moonstone
    5. Spectrolite
    6. Sunstone
  10. Spodumene
    1. Hiddenite
    2. Kunzite
  11. Chrysoberyl
    1. Alexandrite
  12. Spinel
  13. Tourmaline
    1. Chrome
    2. Indicolite
    3. Liddicoatite
    4. Paraiba type
    5. Rubellite
  14. Amber
  15. Ammolite
  16. Anatase
  17. Andalusite
  18. Apatite
  19. Benitoite
  20. Bowenite
  21. Chrysocolla
  22. Coral
  23. Danburite
  24. Dioptase
  25. Enstatite
  26. Fluorite
  27. Hauyne
  28. Iolite
  29. Jade
    1. Jadeite
    2. Nephrite
  30. Konerupine
  31. Lapis Lazuli
  32. Larimar
  33. Opal
    1. Black Opal
    2. Blue Peruvian Opal
    3. Boulder Opal
    4. Fire Opal
  34. Pearl
    1. Salt water
      1. Akoya
      2. Tahitian
      3. South Sea
      4. Mabé
      5. Conch Pearl
      6. Melo Pearl
    2. Freshwater Pearl
      1. Kasumiga pearls
      2. Chinese freshwater pearls
      3. Quahog
  35. Peridot
  36. Poudretteite
  37. Scapolite
  38. Sodalite
    1. Hackmanite
  39. Sphalerite
  40. Sphene
  41. Topaz
  42. Turquoise
  43. Vesuvianite
  44. Zircon