Institute of Gemmological Science

14/02/2022

Rare gem identification two day workshop.

12/02/2022

💎💎BE A DYNAMIC GEM PROFESSIONAL💎💎
APPLIED GEMMOLOGY FAST TRACK COURSE
@ OPASL (Organization of Professional Associations of Sri Lanka)
275, 75 Prof Stanley Wijesundera Mw,
Colombo 07
📌19th Saturday, February 2022📌
⏱ 9.00 am to 1.00 pm ⏱
Call for More information ☎️📞0776229019
Conducted by Guthila Wijesuriya MSc FGA MGA

Course Content :
💎What natural gems are and their nature and origin
💎The formation and occurrence of inorganic gem materials
💎The purpose of using gemstones; Geology of Sri Lanka
💎Crystal Units of the island Crystallization of gem minerals
💎The origin of gems in Sri Lanka
💎Main gem deposits of the island
💎The drainage pattern of the island
💎Weathering of Gem bearing rocks
💎Sedimentary gem deposits
💎Minerals
💎Gem minerals
💎Ornamental gem materials
💎Using the 10x Lens or Loupe
💎Gem mineral crystal forms and habit
💎Crystal surface features
💎Gem mineral categories
💎Cause of colour in gems
💎Mineral hardness, cleavage, fracture and parting
💎Idiochromatic and allochromatic gems
💎Pleochroism (dichroism and trichroism)
💎Light refraction through gems (single & double refraction)
💎Refractive index measurement using the refractometer
💎Using the spectroscope to detect absorption spectra
💎Uses of the UV light source and the Chelsea colour filter
💎Using the polariscope to test specific gems
💎Assessment and determination of specific gravity of gems
💎Study of internal features of gems under the microscope.

I'm Guthila Wijesuriya

Businessman dealing in gems, gem embedded souvenirs and jewelry, lecturing

16/01/2022

Lecturing at Uwa Wellassa University on Gem Fashioning.

16/01/2022

IGS one on one teaching.

13/01/2022

A gem said to be found on a heap of sand, identified as a flame fusion synthetic.

06/01/2022

Immersion microscopy.

12/12/2021

12/12/2021

අද දින පැවැත්වීමට නියමිත සම්මණ්ත්‍රණයට සම්බන්ධ වීමට පහත Zoom link භාවිතා කරන්න

Guthila Wijesuriya is inviting you to a scheduled Zoom meeting.

Topic: Visual Identification of Ruby and Sapphire
Time: Dec 12, 2021 05:00 PM Colombo

Join Zoom Meeting
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09/12/2021

08/12/2021

One on one in residence Industrial Training.

04/12/2021

Applied Gemmology Practical Training.