Table Of Contents

From The Gemology Project
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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
    3. Flame fusion (Verneuil method)
    • Gemstones
    1. Synthetic forsterite
    2. Synthetic moissanite
    3. Synthetic cubic zirconia
  4. Visual Optics
    1. The Hodgkinson Method
  5. Video presentations


Essays
  1. Adding arrows
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 - Polycrystalline
    1. Chalcedony
      1. Agate
      2. Arkansas stone
      3. Bloodstone
      4. Carnelian
      5. Chrysoprase
      6. Jasper
      7. Onyx
      8. Sard
      9. Sardonyx
      10. 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. Calcite
  24. Charoite
  25. Chrysocolla
  26. Clinohumite
  27. Copal
  28. Coral
  29. Cubic zirconia (synthetic)
  30. Danburite
  31. Datolite
  32. Diaspore
  33. Dioptase
  34. Ekanite
  35. Enstatite
  36. Fluorite
  37. Forsterite (synthetic)
  38. Glass
    1. Obsidian
    2. Goldstone
  39. Hauyne
  40. Iolite
  41. Jade
    1. Jadeite
    2. Nephrite
  42. Kornerupine
  43. Kyanite
  44. Lapis Lazuli
  45. Larimar
  46. Malachite
  47. Maw-sit-sit
  48. Moissanite (synthetic)
  49. Opal
    1. Black Opal
    2. Blue Peruvian Opal
    3. Boulder Opal
    4. Fire Opal
  50. 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
  51. Pectolite
    1. Larimar
  52. Peridot
  53. Phenakite
  54. Poudretteite
  55. Rhodochrosite
  56. Scapolite
  57. Siderite
  58. Sodalite
    1. Hackmanite
  59. Sphalerite
  60. Sphene
  61. Topaz
  62. Turquoise
  63. Vesuvianite
    1. Idocrase
    2. Californite
    3. Cyprine
  64. Willemite
  65. Zincite
  66. Zircon