Gemology

Part A – Introduction
•   What is a diamond ?
•   The world’s most famous diamond
part B – Diamond
•   Defination & properties
•   Formation
•   Mine exploration
a)   Exploration of a pipe mine
b)   Extraction
Part C – Cutting & Polishing
Part D – The value of diamond & the 4c’s
•   Carat weight
a)   Diamond weight estimation formula
b)   Diamond weight estimation of round brilliant with normalproportion
•   Clarity
a)   Clarity characteristics
b)   Plotting
c)   Clarity grading
•   Color
a)   Diamond types
b)   Normal color range
c)   Fancy color
d)   Artificially colored diamond
•   Cut
a)   Proportions
b)   Measurement
1)   Round brilliant cut
2)   Fancy shapes
c)   Estimating propartion
1)   The crown angle
2)   The table size
3)   The crown height
4)   The pavillion depth
5)   The girdle thickness
6)   The culet terminology
d)   The proportion grades
1)   The polish
2)   The symmetry
Part E – Simulants & Synthetics
a)   Summary of the most important diamond & imitation’s characteristics
b)   Synthetic diamond
1)   Main producer
2)   Production methods
3)   Identification
Part F – Clarity treatments & Laser Inscriptions

Color Stones Indentification

Part A
•    What is gemology
• What are gems
• Nature of minerals ( crystallization)
• Polishing of gemstones
  A)    Cutting
  B)    Scintillation
  C)    Tumbled stones
  D) Various cutting styles
•    Light & color

Part B
•    Light & refractometer
   a)    Reflection
   b)    Refraction
   c)    Luster
   d)    Total internal reflection
   e)    What is brilliance ?
   f)    Dispersion & fire
   g)    Double refraction
   h)    Refractometer
   i)    Measuring of refractive index
•    Light & polariscope
   a)    Polarized light
   b)    Polariscope
   c)    Use of polariscope
•    Light & spectroscope
   a)    Emission & absorbtion
   b)    The spectroscope
   c)   Some important spectra
•   Light & microscope
•   Dicroism &the dichroscope
•   The chelsea color filter
•   Specific gravity
•   Fluorescence
•   Optical phenomena

Part C
•   inclusions ( corundum , beryl , garnets , zoisite, opal , spinel, zircon , topaz , chrysoberyl , feldspar ,spodumene , etc)

Part D – synthetics
•   The production of synthetics
  a)   Introduction
  b)   Methods to produce synthetic gemstones ( flame fusion, pulling , floating zone , skull melting , flux, hydrothermal
  •   Synthetics from other process( ceremic , sublimation , etc)
  •   Identification of synthetics
  •   More of practical studies

Part E – Treated Gemstones
•   Intro
•   Thermal treatments
•   Irradiation
•   Staining
•   Bleaching
•   Coating
•   Impregnation
•   Fracture filling
•   Laser drilling
•   Doublet & triplets