4
II. About this Book
Thank you for purchasing the world’s rst and only Synthetic Ruby
Identier (“SRI” or “device”) by Presidium.
This handbook is designed to help you set up your device and
describes all you need to know about how to use your gemstone
testing device accurately and take care of it, in line with its
requirements. Please read these instructions carefully and keep them
handy for future reference.
This book also contains the terms and conditions in relation to
the use of the device including the Disclaimer, EXCLUSION and
Limitation of Liability clauses stated above in Section I.
III. About the Synthetic Ruby Identifier by
Presidium
The Presidium Synthetic Ruby Identier (“SRI”) is a revolutionary
new device developed to help identify amongst rubies, the synthetic
ruby that is created through the ame fusion method. Researched
and developed by Presidium in collaboration with the renowned Gem
and Jewelry Institute of Thailand (GIT) near the traditional source
hub of rubies, the Synthetic Ruby Identier is a breakthrough in the
development of gemological instruments, as it is the world’s rst and
only tool, aside from expensive laboratory equipment, that identies
certain common synthetic rubies.
The Synthetic Ruby Identier is designed as a test on known ruby
stones and to differentiate the synthetic ame fusion rubies from
natural and other forms of synthetic ruby. One way to ascertain if
the gemstone is a ruby is to measure the thermal conductivity of the
gemstone. If the gemstone is a ruby, the Synthetic Ruby Identier can
be used to further check if it is a synthetic ame fusion ruby.
Using the knowledge that when gemstones are subjected to deep
UV irradiation, the difference in their light transmittance is signicant
enough to aid in differentiating known rubies, the Synthetic Ruby
Identier measures the UV light transmittance ability of ruby stones,
as research1 has found that synthetic ame fusion rubies are
consistently more transparent to deep UV light.
1 Sim, Hwa San; Leelawatanasuk, Thanong & Saengbuangamlam, Saengthip. “Handheld
Synthetic Ruby Screener based on UV-VIS Light Absorption” in GIT 2012 (Bangkok; Gem
& Jewelry Institute of Thailand, 2012), pp199-204.
