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
  4. Lapidary Arts - Information & Tutorials

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.


Gemology Theory Gemology Practical Gemstones Lapidary Arts
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. Origin determination
  4. The Chemistry of Gemstones
    1. Isomorphous replacement
    2. The Chemical Classification of Gems & Minerals
  5. Crystallography
    1. Crystal Systems
    2. Form
    3. Habit
    4. Symmetry
    5. Twinning
  6. Cleavage
  7. Parting
  8. Fracture
  9. 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
      3. The Phenomenon of Color Change
    6. Refraction
      1. Double Refraction
    7. Dispersion
    8. Diffraction
    9. Interference
    10. Luminescence
      1. Fluorescence
      2. Phosphorescence
      3. Tenebrescence
      4. Triboluminescence
  10. Hardness
  11. Specific Gravity
  12. 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. Origin determination
  4. Gemstone Treatments and Enhancements
    • Methods
    1. Heat Treatment
  5. Synthetic gemstones
    • Methods
    1. Sublimation
    2. Skull crucible
    3. Flame fusion (Verneuil method)
    • Gemstones
    1. Synthetic forsterite
    2. Synthetic moissanite
    3. Synthetic cubic zirconia
  6. Imitation Gemstones
  7. Visual Optics
    1. The Hodgkinson Method
  8. 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. Sunset Quartz
    8. 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. Bastnaesite
  22. Benitoite
  23. Bowenite
  24. Calcite
  25. Charoite
  26. Chrysocolla
  27. Clinohumite
  28. Copal
  29. Coral
  30. Cubic zirconia (synthetic)
  31. Danburite
  32. Datolite
  33. Diaspore
  34. Dioptase
  35. Ekanite
  36. Enstatite
  37. Fluorite
  38. Forsterite (synthetic)
  39. Glass
    1. Obsidian
    2. Goldstone
  40. Hauyne
  41. Hematite
  42. Iolite
  43. Jade
    1. Jadeite
    2. Nephrite
  44. Jeremejevite
  45. Kornerupine
  46. Kyanite
  47. Lapis Lazuli
  48. Larimar
  49. Malachite
  50. Maw-sit-sit
  51. Moissanite (synthetic)
  52. Opal
    1. Black Opal
    2. Blue Peruvian Opal
    3. Boulder Opal
    4. Fire Opal
    5. Pink Opal
  53. 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
  54. Pectolite
    1. Larimar
  55. Peridot
  56. Phenakite
  57. Poudretteite
  58. Prehnite
  59. Pyrite
  60. Rhodochrosite
  61. Sapphirine
  62. Scapolite
  63. Serendibite
  64. Siderite
  65. Sodalite
    1. Hackmanite
  66. Sphalerite
  67. Sphene
  68. Taaffeite
  69. Topaz
  70. Turquoise
  71. Vesuvianite
    1. Idocrase
    2. Californite
    3. Cyprine
  72. Willemite
  73. Zincite
  74. Zircon
Content
  1. Lapidary Arts
  2. Faceting
    1. Concave Faceting
  3. Cabbing
  4. Carving
  5. Tutorials
    1. Tutorial Help
    2. Easy Combination cutting MV
  6. Equipment
  7. Faceting Designs
    1. By Author
    2. By RI
    3. By Shape
    4. By L/W
    5. By Gear
    6. By Facets
    7. Design posting Help