Instructor: Branko Deljanin, B.Sc., GG, FGA, DUG (CGL-GRS Lab, Canada)
Audience: For gemmologists, appraisers, and individuals with trade experience
Location: Brisbane, Australia
Date: Mar 13, 2019
Full Day: 9:00am – 5:30pm
Historically ruby and sapphire are the most significant colored stones. Rubies are expected to have some inclusions because of their growing environment that can help with identification (natural, treated or synthetic). Heating is an accepted treatment in the trade and today, almost all but the finest rubies and sapphires are routinely heated.
Sapphires have some natural inclusions that in combination with spectroscopy can help identify a sapphire’s country of origin. Yellow, orange and blue sapphires can be heated with additional lighter elements to induce color. Lattice diffusion with beryllium is more permanent than traditional titanium diffusion treatment.
- Corundum Treatments
- Detection of Heat Treatments of Ruby and Sapphire
- Heat Treatments with Chemical Elements
- Effect of Heat Treatments on Inclusions
- Synthetic Rubies and Sapphires
- Use of Advanced Instruments in Detection of Treatments and Synthetics
- Certification of Rubies and Sapphires at Gem Labs
PRACTICAL LAB SESSION
- Separation of ruby and other red gems using standard portable instruments
- Use of microscopes and UV lamps for detection of rubies and sapphires
- Participants we will look at inclusions in ruby, sapphire and emeralds from different localities, detection of heat treatments and lead glass-filled rubies and oiled emeralds with a microscope
- Different fluorescence reactions of red gems and sapphire will be examined with PL Inspector
Tools to bring home: handouts, NEW booklet “ID of Transparent Red, Pink and Purple Gems with Portable Instruments” by Branko Deljanin, John Chapman, 30AUS value
Available for sale: books, CPF loupe, Jewellery and PL inspectors