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Gemologist

Gemologists identify, grade and value gemstones and diamonds, and tell natural stones from treated or synthetic ones. There is no single entrance exam.

Class 11–12 subjectsPCM or PCB
Entrance / admissionInstitute admission / Class 12 marks
DegreeDiploma in Gemology (+ B.Sc optional)
DurationMonths to 1 yeardiploma

Your route, step by step

  1. 1Class 11–12: PCB or PCMChemistry and Physics help in understanding minerals and optics.
  2. 2Do a gemology diplomaCourses from institutes such as the Indian Institute of Gems & Jewellery (run with the GJEPC) — each sets its own admission.
  3. 3Add a degree if you likeB.Sc Geology or Chemistry gives a stronger science base.
  4. 4Gain experienceWork in labs or jewellery firms; build trust and an eye for stones.

What a gemologist does

  • Identify gemstones with lab instruments
  • Grade diamonds for cut, colour and clarity
  • Detect treated and synthetic stones
  • Advise jewellers, buyers and insurers

Entrance exams & admission

  • Institute admissionEach gemology institute sets its own rules
  • Class 12 marksMost Tamil Nadu arts & science colleges

Where you may work

Gem-testing labs, jewellery companies, diamond-trading firms, auction houses and your own business.

Well-known colleges in and near Tamil Nadu

  • Indian Institute of Gems & Jewellery

Official links

Links checked: Oct 2026. Always confirm dates and rules on the official site.

Outlook

India is a world centre for diamond cutting and jewellery, so trained gemologists find work in labs and trade.

Specialise later

  • Diamond grading
  • Coloured gemstones
  • Gem-testing lab
  • Jewellery design
  • Gem trading