Course in Gemmology

You will learn to grade and identify both Diamonds and Coloured Gemstones in JDTI's well-equipped Gemmology Lab. The institute has a large updated collection of stones which aids in the practical experience.

Programme Contents Introduction to Gemmology

Diamonds

• Historical Background, Origin, Geological Timetable, Mining, Occurrence & Major deposits of the World
• Crystallography, Physical, Chemical, Optical Properties, Distinctive Features, Inclusions and Characteristics
• Treatment of Diamonds and their method of detection/ identification
• Flow of Rough Diamond from Mines to Sites, Diamond Trade
• Nomenclature and Grading System
• Importance of 4' Cs (Cut, Color, Clarity and Carat)
• Types and Forms of Cuts
• Instruments for Weight Estimation

Coloured Gemstones

• Historical Background, Nomenclature of Gemstones, Origin, Geological timetable, Mining, Occurrence. Major Gem Stones Deposits of the World
• Famous Gemstones, Folklore, influence, Healing properties, Birthstones & Astrological view
• Nature of Gem Materials, Crystal Systems, Crystallography, Physical, Chemical & Optical Properties. Inclusions, Characteristics and Sources of best Known Gemstones to Trade
• Use of Gemmolite and other Gemological Instruments in Identification.
• Identification Techniques
• Types and Forms of Cuts
• Enhancement-Treatments and Methods of Detection/Identification
• Synthetic Stones - Important Properties and Identification Methods
• Organic Gemstones and their Physical, Chemical, Optical Properties, Sources & Identification Techniques
• Instruments for Weight Estimation

To further enhance your knowledge, following additional classes are provided at the culmination of the Gemmology course:

• Visit to a museum/ Mine
• Theory in Stone Setting
• Demonstration of various types of setting
• Demonstration of jewellery manufacturing techniques