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. 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. 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 effects
      1. Luster
      2. Sheen
        1. Chatoyancy
        2. Asterism
        3. Iridescence
      3. Brilliance (Total Internal Reflection)
    3. Polarization
    4. Pleochroism
    5. Color
      1. 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
  4. Visual Optics
    1. The Hodgkinson Method
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
    1. Achroite
    2. Bi-color
    3. Chrome
    4. Dravite
    5. Indicolite
    6. Liddicoatite
    7. Paraiba type
    8. Rubellite
    9. Schorl
    10. Tri-Color
    11. Verdite
    12. Watermelon
  14. Amber
  15. Ammolite
  16. Anatase
  17. Andalusite
  18. Apatite
  19. Benitoite
  20. Bowenite
  21. Californite
  22. Charoite
  23. Chrysocolla
  24. Coral
  25. Cyprine
  26. Danburite
  27. Datolite
  28. Dioptase
  29. Enstatite
  30. Fluorite
  31. Glass
    1. Goldstone
  32. Hauyne
  33. Iolite
  34. Jade
    1. Jadeite
    2. Nephrite
  35. Kornerupine
  36. Lapis Lazuli
  37. Larimar
  38. Maw-sit-sit
  39. Opal
    1. Black Opal
    2. Blue Peruvian Opal
    3. Boulder Opal
    4. Fire Opal
  40. Pearl
    1. Salt water
      1. Akoya
      2. Tahitian
      3. South Sea
      4. Mabé
      5. Conch Pearl
      6. Melo Pearl
      7. Quahog
    2. Freshwater Pearl
      1. Kasumiga pearls
      2. Chinese freshwater pearls
  41. Peridot
  42. Poudretteite
  43. Scapolite
  44. Sodalite
    1. Hackmanite
  45. Sphalerite
  46. Sphene
  47. Topaz
  48. Turquoise
  49. Vesuvianite
  50. Willemite
  51. Zincite
  52. Zircon