Table Of Contents

In affiliation with GemologyOnline.com
From The Gemology Project

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. Barite
  22. Bastnaesite
  23. Benitoite
  24. Bowenite
  25. Calcite
  26. Charoite
  27. Chrysocolla
  28. Clinohumite
  29. Copal
  30. Coral
  31. Cubic zirconia (synthetic)
  32. Danburite
  33. Datolite
  34. Diaspore
  35. Dioptase
  36. Ekanite
  37. Enstatite
  38. Fluorite
  39. Forsterite (synthetic)
  40. Glass
    1. Obsidian
    2. Goldstone
  41. Hauyne
  42. Hematite
  43. Iolite
  44. Jade
    1. Jadeite
    2. Nephrite
  45. Jeremejevite
  46. Kornerupine
  47. Kyanite
  48. Lapis Lazuli
  49. Larimar
  50. Malachite
  51. Maw-sit-sit
  52. Moissanite (synthetic)
  53. Opal
    1. Black Opal
    2. Blue Peruvian Opal
    3. Boulder Opal
    4. Fire Opal
    5. Pink Opal
  54. 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
  55. Pectolite
    1. Larimar
  56. Peridot
  57. Phenakite
  58. Poudretteite
  59. Prehnite
  60. Pyrite
  61. Rhodochrosite
  62. Sapphirine
  63. Scapolite
  64. Serendibite
  65. Siderite
  66. Sodalite
    1. Hackmanite
  67. Sphalerite
  68. Sphene
  69. Taaffeite
  70. Topaz
  71. Turquoise
  72. Vesuvianite
    1. Idocrase
    2. Californite
    3. Cyprine
  73. Willemite
  74. Zincite
  75. 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. Database Search
Personal tools
Namespaces
Variants
Actions
Navigation
Tools
Toolbox