WHAT IS GEMMOLOGY?

 

 
Gemmology is the study of natural, synthetic and imitation Diamonds, Gemstones and Semi-Precious Stones
Diamond Ring by Zoe Phillips; Jewellery courses; expert tutors, www.bespokejewellerytraining.co.uk

Gemmology is a science that deals with the technical understanding of Precious and Semi-Precious stones, such as Diamonds, Sapphires, Topaz, Pearl.  

 

Gemmologist identify and evaluate stones by using special hand-held small equipment or machines such as a 10x lens, polariscope or refractometer.

 

Looking at the cut, colour and clarity of each stone, they identify flaws and grade or evaluate a stones to determine if it is a natural, treated or imitation stone.

A 1-day course will not make a Gemmologist of you.

 

However you can learn basic identification methods, and terminology useful in the buying process. 

 

 

 

ABOUT DIAMONDS  

 

A 1-day introduction to Diamond Grading course can help you understand the basics of the following subject areas;

 

  • Learn how Diamond Grades Differ

 

  • Learn what the process for Grading Diamonds for cut, colour and Clarity is

 

  • Learn how a diamond carat weight is determined

 

  • Which factors Testing laboriatories require for their reports.

 

All a useful product knowledge introduction for retailers.

 

 

 

 

 

 

NATURAL STONES

 

Gemstones are  minerals with naturally occurring crystals. Colours are defined by how light is absorbed by the crystal within the mineral and/or from metal impurities within the mineral.

 

Gemstones diversity is due to their formation at different depths within the Earth. Composition is affected by many factors such as; Chemical elements, time, temperature, pressure and space.

 

Organic material such as Pearl, Coral or Jet can also be classified as gemstones.

 

  • Choose a Gemstone, learn how it is formed and about its chemical composition

 

 

 

TREATED STONES

 

Treatments made to stones can alter their colour or clarity in order to falsely enhance a perceived value of a stone.

 

Treatments can also effect a stones natural durability.

 

Depending on the stone, treatments can include;

 

Bleaching

Coloured backs

Filling cracks

Hard Coatings

Dyeing;

Heat / High Temperature Laser Drilling Diamonds; Irradiation

Impregnation (Wax/Plastic)

 

 

  • Learn to identify the indicators of treatments

 

 

 

 

WHAT ARE SYNTHETIC  DIAMONDS?

 

Synthetic Diamonds are a type of man-made carbon.

 

They are manufactured in a laboratory that re-creates artificial chemicals, heat and pressure similar to Earths natural geological forces.

 

The most common form of Diamond synthetics or simulants are;

 

Moissanite and Cubic Zirconica (CZ)

 

  • Learn to spot the differences between a synthetic and real diamond.

 

 

 

 

 

 

SIMULANT / IMITATION STONES

 

A simulant diamond or gemstone can be artificial (laboratory created) or a similar natural or a combination of both.

 

Differences to genuine stones can be indicated by checking properties such as;

 

Weight

Hardness

Brilliance

Colour

Fluorescence

Fraining

 

 

  • Learn how to identify a simulated stone

 

 

 

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Please email  Dawn Meaden-Johnson for information.

Email: bespoketraining@virginmedia.com

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