DGL / DELHI GEM & JEWELLERY INSTITUTE
2021, Bank Street
Karol Bagh
New Delhi 110005
India
ph: 91-9811267001, 91-9818246317
alt: 91-11-41546317
info
Complete Gemology
Get the trade oriented training with true, ethical and professional lab standards from India's First Master Trainer by the G&J S council of India with 34 years of Jewellery trade experience as legacy & adding 16 years of teaching experience.
DURATION: 6 Months ( 5 days a week-Tuesday to Saturday)
Module I
Diamond Grading & Identification Course (DGIC) 2 Months
- Characteristics
- Formation
- Sources
- Minning
- Cutting & polishing Centres
- Trading Centres
- Crystal System
- Physical Characteristics
- Optical Properties
- Clarity
Blemishes & Inclusions
Plotting & Identification
International Standard of Grading - Carat
Devices/ Tools
Estimation of Weight
Concept of Sieves - Colour
International Standard of Grading
Master stones & Procedure - Cut
Table %, Crown Angle
Girdle Thickness, pavilion Depth
Crown Height, Total Depth
Culet Size
Polish & Symmetry
Excellent/Very Good/Good/Fair/Poor Standards
- Fluorescence
- Fancy Colour
- Fancy Shapes
- Pricing/ Valuation
- Identification of Synthetics & Simulants
- Synthetic Moissanite
- Synthetic Diamond
- Treatments
- Market terms/ Indian Trade
- Diamond Sorting
- Rejection & selection
- Series Making
Module I I
Coloured Gemstones Identification Course (CGIC) 4 Months
- Gemology
- Minerals
- Categories of Gemstones
- General Observations
Colour, Transparency
Cutting Style, Phenomena
Luster, Dispersion, Heft
Assembled Stones - Physical characteristics
- Crystallography
- Light Theory/ Polarization
- Inclusions- Characteristic/ Diagnostic
- Equipments
- Group/Specie/Variety
- Gemstone Study
Practical Study of Minimum 850 Stones - Identification of Mines/ Sources
- Identification of Synthetics
Flame Fusion/Verneuil Process
Pulled / Czochralski,
Skull Melt
Flux
Hydrothermal / Bomb
Stones Synthesized
Characteristics/Manufacturers
Identification techniques - Gem Enhancement Techniques
Heat, Radiation, Chemical Diffusion
Fracture Filling, Bleach, Surface Modification
Surface Impregnation, Laser Drilling
- Fluorescence
- Pricing/ Valuation
- Treatments
- Market Terms/ Indian Trade
DGL / DELHI GEM & JEWELLERY INSTITUTE
2021, Bank Street
Karol Bagh
New Delhi 110005
India
ph: 91-9811267001, 91-9818246317
alt: 91-11-41546317
info