Grading & Sorting of Gemstones (Practical)

Paper Code: 
25DJWT503 (A)
Credits: 
6
Contact Hours: 
120.00
Max. Marks: 
100.00
Objective: 

Course Objectives:

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.

 

Course Outcomes: 

Learning outcomes (COs):

Course

Learning outcomes

(at course level)

Learning and teaching strategies

Assessment

Strategies

COURSE CODE

COURSE TITLE

25DJWT  501(A)

Gemology 

CO112: Develop an in-depth comprehension of the principles and techniques used in distinguishing, categorizing, and evaluating both raw and refined forms of valuable gemstones, including precious, semi-precious, and organic varieties. Achieve expertise in employing specialized tools and instruments to accurately assorting and evaluating the unique attributes and qualities of gemstones

CO113: Compile comprehensive practical records detailing plans related to jewellery design across diverse institutional settings and cultivate verbal communication skills to converse effectively with examiners.

CO114: Contribute effectively in course-specific interaction.

Approach in teaching: Interactive Practical Sessions , Theme board  , Demonstrations ,Giving tasks, Field practical , inspiration board,  Workshop ,  Laboratory industry visits,  Group and Team work

Learning activities for the students: Self-learning assignments, Effective , Product and Design development

Class test, Semester end examinations, Assignments, Presentation, Individual and group projects

 

120.00

Uses of various instruments:                                                                        120 Hours

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

  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

     Identification of Diamond                                                                      

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

       Identification of Organic gem minerals-                                              

  • Pearl, amber, coral & shell.

 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 & Jewellery by IMACBC Co.Ltd           
  • Matlins, A. (2009) Jewellery & Gems: The Buying Guide    
  • Jaffer, A. (2019) Beyond Extravagance : A royal collection of gems and jewels      by Assouline

 

References: 
  • 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, Jewellery & 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

 

Academic Year: 
2025-2026
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