Grading & Sorting of Gemstones

Paper Code: 
DJWT 501(A)
Credits: 
4
Contact Hours: 
120.00
Max. Marks: 
100.00
Objective: 

This course will enable the students to –

  1. Enhance the skills of  the  formation of gemstones, their crystal system, physical, optical & chemical properties-Study of 4 ‘C’s of diamonds, Use of various Gemology instruments.

 

20.00
Unit I: 
Uses of various instruments

                                                     

  • Refract meter, Polariscope, Microscope, Spectroscope, Ultraviolet lamp, Hardness pencil, Diamond probe, Chelsa filter, 10x lens. MM Watch, optimizer, sieve etc

 

20.00
Unit II: 
Identification, Sorting and Grading Of Stones.

                            

  • Rough and polished gems
  • Synthetic and stimulant
  • Absorption Spectrum.
  • Defects in gem minerals
  • Flaws and inclusions.
  • Recognize the color, clarity and cut grading criteria of gemstones

 

30.00
Unit III: 
Identification of Diamond

                                                   

  • Natural and synthetic diamond,
  • Quality of diamond
  • Inclusions in Diamond and their significance

 

20.00
Unit IV: 
Identification of Organic gem minerals-

                       

  • Pearl, amber, coral & shell.

 

30.00
Unit V: 
Assortment and evaluation

                                                            

  • Rough stones
  • Cut and polished
  • Stone single stone
  • Packet lots
  • Unusual stones
  • Collect just a bunch of pictures of common and rare gems with a few bullet points on each, & collect some approachable gem stones for presentation.

 

Essential Readings: 

·       Karanth, R.V (2008) Gemstones: Enchanting Gifts of Nature by Geological society of india Ltd.

·       Chikayama, A. (2013) Dictionary of Gemstones & Jewelry by IMACBC Co.Ltd           

·       Matlins, A. (2009) Jewelry & Gems: The Buying Guide     

·       Jaffer, A. (2019) Beyond Extravagance : A royal collection of gems and jewels            by Assouline

            

References: 

SUGGESTED READINGS:

  • Read, P. G. (2005). Gemmology. Butterworth-Heinemann.
  • Hall, J. (2016). The crystal bible. Penguin.
  • O'Donoghue, M. (2012). Gemstones. Springer Science & Business Media.
  • Antonio C. Bonanno 2016, Jewelry & Gems, The Buying Guide, Gem Stone Press; (8th ed)
  • Weinstein, M. (2013). Precious and semi-precious stones. Read Books Ltd.
  • Pedersen, M. C. (2004). Gem and ornamental materials of organic origin/by Maggie Campbell Pedersen

E-RESOURCES:

JOURNALS:

  • Diamond World
  • Jewellery News India
  • Art of Jewellery
  • Journal of Gem & Jewellery

 

Academic Year: 
2023-2024
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