Gemmology ppt. of workshop
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Transcript of Gemmology ppt. of workshop
IIGJ Welcomes You in
Presentation on
Introduction of Gemology
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 salt water.
GemologyThe 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 & methods employed in their identification
The Need for Gemology
The increasing number of
Man-made Imitations,
Synthetics & Treatments
make it essential for a
Systematic & Scientific
study of Gems & Diamonds.
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 identifiedHow they manufactured
Crystalline inclusion
Silk in Burma ruby
Silk with
Hexagonal
structure
Treatment
Enhancements or treatments are done on the gemstone to improve their colour and clarityWhat types of Treatments are availableHow they identifiedDifferent procedure of treatment
NavratnaRuby - Manak
Coral - Moonga
Pearl - Moti
Diamond - Heera
Emerald - Panna
Yellow Sapphire - Pokhraj
Blue Sapphire - Neelam
Hessonite Garnet - Gomed
Chrysoberyl Cat’s eye - Lahsunia
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 knowledge of Gems &
Diamonds.
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!!!!!!!!!!!!!!!!
B. R. D…………… A Gem? Beauty – subjective
4 C’s……+ phenomena
Durability - wearability
Rarity – natural or man made
Colour Key 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 dark)
Distribution — the even/ uneven distribution of color
Clarity
Internal features inclusions
Number
Size
Position
Colour
Cut Style of cut
– brilliant, step, cabochon, bead
Perfection of cut – symmetry, polish etc
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
Transparency
Transparent
Semi Transparent
Translucent
Semi – Translucent
Opaque
Optical Phenomena
Asterism
Chatoyancy nordskip.com
Colour Change
Metamerism
Optical Phenomena
Sheen / Adularescence
geocities.jp
Play of Colour
Aventurescence spiritoftherock.sslp
owered.com
Oriented
Who are the people to benefit?
The TRADER / JEWELLER:
The NEXT GENERATION
YOU – The Investors:
For the Jewellery Designer
Knowledge of a range of Gems
Customer specification
Budget requirement.
For the Jewellery Manufacturer
Setting Style
Repairing
Polishing jewellery.
Care & Cleaning
Qualifications required
You could be a graduate or an undergraduate
Prior knowledge of gemstones is not required.
Assessment
practical work sheets form part of the continuous assessment
Practical test at end of Programme
Objective Tests are also given
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.
Career Positions
(Academic)
Instructor for Gemmology
–Technical Laboratory Technician or Asst.:
Mounted Jewellery Grading
Gem Testing Laboratory
Advanced Technology Lab
Career Positions Entrepreneurs
Gemstone ConsultantFreelance Jeweler / TraderGemstone Inspector (Banks, Insurance Cos.)Gemstone AppraiserAdministrationAsst. ManagerCustomer Service RepresentativeAdministrative Asst.Store ManagerBrand ManagerPurchase Manager ( Gems)Merchandising Executives….
Career PositionsMarketing
Sales Associate
Sales professional
Sales & Marketing
Asst.
Retail Sales
Sales Specialist
Sales/ Marketing
Executive
Traveling Sales &
Marketing
Representatives…
YOUR SEARCH ENDS HEREIf 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
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
Introduction to Basic Gem Testing for
Jewellery IndustryContents:-
Introduction
Transparency, Luster and
sheen,
Anisotropism and Dichroism
Refractive Index
Spectroscopy – Ultra – Violet
Test
Microscopy
Synthetic and Treated
Gemstone
Practical Exercise
THANK YOU