This is a hands-on course designed for those who already have knowledge of Coloured Gemstones and will reveal the inside story about gemstone treatments. Under the expert tuition of Gwyn Green, delegates will study a range of sample stones and learn some important lessons about detecting treatments and recognising the tell-tale signs that a stone is not entirely natural and. Provides 6 hours of Continuing Professional Development (CPD) Activity.
Why are gemstones treated?
Types of treatment and the gems suitable
Surface and Sub-surface treatments
Which gems on the market are commonly subject to treatments?
Detection of Treatments
Appearance before and after treatments
Signs that a gem has been treated – what to look for
Simple tests to determine whether or not a gem has been treated
Reliability of treatments
The Down-side of treatments
Disclosure of treatments, CIBJO regulations
Examination of treated gems to compare appearance by eye and using magnification with untreated gems
Discussion of sophisticated techniques necessary for to detect some treatments.
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