Reports & Services
CGG receives a
varied and complex range of items for identification;
stones and pearls, unusual carvings and
jewelry, to the
latest in synthetics, and simulants, as well as treated gems such as
rubies, and sapphires.
Gem certification can cost between $10 and $300 + depending on the
wants of the customer. Should a customer only require a certification
that a pink gemstone
is indeed a natural pink tourmaline only 2 or 3 tests would be
necessary such as optical
character, specific gravity and refractive index. These tests are
Should however, a yellow gemstone need to be tested to
establish it is an unheated, natural, untreated, yellow sapphire from
then all tests including laser induced breakdown spectroscopy would be
This would take a great deal of time and cost a considerable sum and
then the origin can only be 'presumed' on evidence of 'optical
to be Sri Lanka. In addition only a few labs worldwide can test for the
complete range of induced foreign substances using advanced technology
and established proceedures and CGG would need to sub-contract such an
the customer only requires a certification that the yellow
sapphire is indeed
naturally mined then the cost is obviously rather less.
- Our services
restore confidence in gem identification.
- We've been in
business for over 10 years in Australia and Thailand and we shall
shortly be offering an on-line service.
- Contact us with your requests.
the best technology in his research and
identification efforts, the
gemologist performs a variety of analytical investigations, including a
microscopic examination of the item, and performs all the tests
properly determine its gemological identity and detect any treatments.
Identification and Grading