Table Of Contents

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In this TOC (Table Of Contents) 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 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.
Although gemology is not rocket science, some science and math is involved. We don't believe in the dumbing-down of gemology, so you should be ready and willing to expand your horizons. If you find any of the technical concepts difficult to visualize or grasp, go to the forum (the link is above) and ask. We will help you with it, and at the same time you will help this project become more complete for those who come after you.

We never said it was going to be easy. But it's a heck of an interesting ride.


Theory Practical Gemstones
Content
  1. Introduction to Gemology
    1. Education
    2. 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. Parting
  7. Fracture
  8. Optical properties of gemstones
    1. Nature of light
      1. The electromagnetic wave theory
      2. The quantum theory
      3. The electromagnetic spectrum
    2. Reflection
      1. Luster
      2. Sheen
        1. Chatoyancy
        2. Asterism
        3. Iridescence
      3. Brilliance (Total Internal Reflection)
    3. Polarization
    4. Pleochroism
    5. Color
      1. Color grading
      2. Causes of color
    6. Refraction
      1. Double Refraction
    7. Dispersion
    8. Diffraction
    9. Interference
    10. Luminescence
      1. Fluorescence
      2. Phosphorescence
      3. Tenebrescence
      4. Triboluminescence
  9. Hardness
  10. Specific Gravity
  11. 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
    • Methods
    1. Sublimation
    2. Skull crucible
    • Gemstones
    1. Synthetic forsterite
    2. Synthetic moissanite
    3. Synthetic cubic zirconia
  4. Visual Optics
    1. The Hodgkinson Method
  5. Video presentations
Content
  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. Chrome grossular
      2. Hessonite
      3. Hydrogrossular
      4. Mali
      5. 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
    • Species
    1. Chromdravite
    2. Dravite
    3. Elbaite
    4. Liddicoatite
    5. Schorl
    • Varieties
    1. Achroite
    2. Bi-color
    3. Indicolite
    4. Paraiba
    5. Rubellite
    6. Siberite
    7. Tri-Color
    8. Verdelite
    9. Watermelon
  14. Amber
  15. Ammolite
  16. Anatase
  17. Andalusite
  18. Apatite
  19. Axinite
  20. Azurite
  21. Benitoite
  22. Bowenite
  23. Charoite
  24. Chrysocolla
  25. Clinohumite
  26. Copal
  27. Coral
  28. Cubic zirconia (synthetic)
  29. Danburite
  30. Datolite
  31. Diaspore
  32. Dioptase
  33. Enstatite
  34. Fluorite
  35. Forsterite (synthetic)
  36. Glass
    1. Obsidian
    2. Goldstone
  37. Hauyne
  38. Iolite
  39. Jade
    1. Jadeite
    2. Nephrite
  40. Kornerupine
  41. Kyanite
  42. Lapis Lazuli
  43. Larimar
  44. Maw-sit-sit
  45. Moissanite (synthetic)
  46. Opal
    1. Black Opal
    2. Blue Peruvian Opal
    3. Boulder Opal
    4. Fire Opal
  47. Pearl
    1. Salt water
      1. Akoya pearl
      2. Tahitian
      3. South Sea
      4. Mabé
      5. Sea of Cortez pearl
      6. Conch Pearl
      7. Melo melo pearl
      8. Quahog
    2. Freshwater pearl
      1. Kasumiga pearl
      2. Chinese freshwater pearl
  48. Pectolite
    1. Larimar
  49. Peridot
  50. Phenakite
  51. Poudretteite
  52. Scapolite
  53. Sodalite
    1. Hackmanite
  54. Sphalerite
  55. Sphene
  56. Topaz
  57. Turquoise
  58. Vesuvianite
    1. Idocrase
    2. Californite
    3. Cyprine
  59. Willemite
  60. Zincite
  61. Zircon