Gemmology is a vast subject to learn about all the Gemstones, their properties, occurrences, geographical location, geometrical structure or formations, various colour shades, transparency to opaque, sheen & luster, cuts & shapes, carat & cost, testing through various instruments & devices for their Real, synthetics or simulants.

1. IIGJ
Welcomes You in
Presentation
on
Introduction of
Gemology

2. Interesting Facts about
Gemstone
In ancient times the term "Sapphire" meant all
blue stones, but usually meant Lapis Lazuli -
which was considered the most expensive stone
in the world.
Diamonds are the most hardest stones.
Tourmaline s are the only gemstone which
come in almost all colour and shades. It’s called
as rainbow gem also.
Amber is an organic gemstone also very
lightest and softest, it is so light it can float in to

3. Gemology
The professional course that gives you
the fastest returns.
The science of gem-
materials is gemology.
It covers all aspects of
Where & how they occur
on earth,
Their physical & optical
properties &
characteristics.
The techniques used in
their cutting & polishing
The instruments &

5. The Need for Gemology
The increasing
number of
Man-made
Imitations,
Synthetics &
Treatments
make it essential
for a
Systematic &
Scientific
study of Gems &

6. Synthetic
Synthetic
Gemstone has
same property as
natural
gemstone, but
they are created
in laboratory.
What types of
Synthetic
available in the
market?
How they
Crystalline
inclusion
Silk in
Burma
ruby
Silk with
Hexagonal
structure

7. Treatment
Enhancement
s or
treatments are
done on the
gemstone to
improve their
colour and
clarity
What types of
Treatments
are available
How they
identified
Different

8. Navratna
Ruby - Manak
Coral - Moonga
Pearl - Moti
Diamond - Heera
Emerald - Panna
Yellow Sapphire - Pokh
Blue Sapphire - Neelam
Hessonite Garnet - Gom
Chrysoberyl Cat’s eye -
Lahsunia

9. Need……
The maximum
profits in the
jewellery
industry lies in
gems &
diamonds.
Therefore all
those who wish
to invest / gift /
trade in gems &
diamonds not
only do they
need to be
aware but also
require

10. Precious / Semi –
Precious
All stones are gemstones
For export/ import purposes – terms
precious & semi-precious are used
Precious – ruby, emerald, sapphire,
diamond,
Semi-precious – all others
In ancient times – the navratnas were
considered precious
IN CURRENT TIMES THERE IS NO
SUCH THING!!!!!!!!!!!!!!!!

11. B. R. D……………
A Gem?
Beauty – subjective
4 C’s……+ phenomena
Durability - wearability
Rarity – natural or man made

12. ColourKey elements
In describing Color:
Hue — the
precise spectral
color –red
Intensity -
brightness or
vividness,
dullness or
drabness of the
color
Tone - the depth
of color (light or

13. Clarity
Internal
features
inclusions
Number
Size
Position
Colour

14. Cut
Style of cut –
brilliant, step,
cabochon, bead
Perfection of
cut – symmetry,
polish etc

15. Luster
Metallic : Hematite (Gunmetal)
Adamantine : Diamond
Vitreous : Ruby , Emerald
Silky : Tiger’s eye
Pearly : Moonstone
Waxy : Turquoise
Greasy : Hessonite garnet
Resinous : Amber
Orient : Pearl
Dull : Any gem material which
is poorly handled

16. Transparency
Transparent
Semi Transparent
Translucent
Semi – Translucent
Opaque

17. Optical Phenomena
Asterism
Chatoyancy
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Colour
Change
Metameris

18. Optical Phenomena
Sheen /
Adularescence
geocities.jp
Play of
Colour
Aventurescence
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red.com
Orient

19. Who are the people to benefit?
The TRADER /
JEWELLER:
The NEXT
GENERATION
YOU – The
Investors:

20. For the Jewellery Designer
Knowledge of
a range of
Gems
Customer
specification
Budget
requirement.

21. For the Jewellery Manufacturer
Setting Style
Repairing
Polishing
jewellery.
Care & Cleaning

22. Qualifications required
You could be a
graduate or an
undergraduate
Prior knowledge of
gemstones is not
required.

23. Assessment
practical work
sheets form part of
the continuous
assessment
Practical test at
end of Programme
Objective Tests are
also given

24. Reward
At the end of the course – on
successfully completing the theory &
practical examinations the student is
awarded an I.I.G.J. certificate.
An I.I.G.J. Programme helps students
achieve a level of knowledge which
can lead them directly into the
industry.

25. Career Positions
(Academic)
Instructor for Gemmology
–Technical
Laboratory Technician or
Asst.:
Mounted Jewellery
Grading
Gem Testing Laboratory

26. Career Positions
Entrepreneurs
Gemstone Consultant
Freelance Jeweler / Trader
Gemstone Inspector (Banks,
Insurance Cos.)
Gemstone Appraiser
Administration
Asst. Manager
Customer Service Representative
Administrative Asst.
Store Manager
Brand Manager
Purchase Manager ( Gems)
Merchandising Executives….

27. Career Positions
Marketing
Sales Associate
Sales professional
Sales & Marketing
Asst.
Retail Sales
Sales Specialist
Sales/ Marketing
Executive

28. YOUR SEARCH ENDS HERE
If you are in search of a challenging /
interesting career with quick returns then
the answer is
Introduction to
Gemmology
- 50 SESSIONS
Gem Testing
– 10 SESSIONS

29. Introduction to
Gemmology Contents
Contents:-
Nature of Gemstones,
Chemical Characters of Gemstones
Crystalline structure of Gemstones
Physical and optical characteristics of
Gemstone
Identification of gemstones (practical)
Internal features of gemstones
Synthetics and treatments
Cutting and polishing of gemstones

30. Introduction to Basic
Gem Testing for Jewellery
Industry
Contents:-
Introduction
Transparency, Luster and sheen,
Anisotropism and Dichroism
Refractive Index
Spectroscopy – Ultra – Violet Test
Microscopy
Synthetic and Treated Gemstone
Practical Exercise