LABORATORY ALERTS and NEWS |
The following links are provided to allow gemmologists keep up-to-date with developments in the industry. Copyright and content responsibility remain with the linked organization and do not represent any endorsement by Gemlab Research & Technology (GLR&T) or the Canadian Institute of Gemmology (C.I.G.).
Flux-Heated and Glass-Filled Rubies from Mozambique from GIA Thailand (May 11, 2010)
Lead Glass filled Star Rubies from Madagascar from GIA Thailand (February 1, 2010)
GIA Laboratory Bangkok's "Ongoing Research" page
Paraiba Tourmalines GRS Contributions to Gemmology No.9, May 2009
Flux grown synthetic red spinels
Fracture healing/filling of Mong Hsu ruby
The Tanzanian “Winza“- (Dodoma) Rubies GRS Contributions to Gemmology No.7, April 2008
New Rubies from Tanzania, SSEF Newsletter May 2008
Diamond Cut Study Project - Links from OctoNus
SSEF Facet No. 14 - January 2007
Gem Quality CVD Synthetic Diamond - from Australian Gemmologist
Beryllium Diffusion of Ruby and Sapphire 1.2 MB, From Gems & Gemology, Summer 2003
Lab Reports from Gemmological Association of All Japan
Durability of significant fissure filled ruby with lead-glass
New Geological Origin: Ruby from Winza of Tanzania
Rutilated Quartz Filled with Transparent Materia
Cu-Bearing Synthetic Beryl in “Paraíba Colour
Synthetic opal called “MexiFire” and “PeruBlu”
Identification of heated / unheated status on ruby and sapphire
Detection of filling material in fissure and fracture of emerald
New Coating Treatment on Diamond
Experiment of HPHT treatment of diamond and gemstones
Up-to-date Be-diffused Blue Sapphire
Laser tomography - a laboratory technique for the microscope
Rubies from A New Deposit in Tanzania
Rubies with Unusual Characteristics
Update on an Uncommon Lead-Glass Treated Ruby
Fracture-Filled orangey pink sapphire with lead glass
News Treatment on clarity enhancememt of ruby: Not only lead
New treatment onf ruby: Lead glass filling
Irradiated Topaz: Harmful or not? Why?
Whole Round Freshwater Cultured Pearl
Irradiated Topaz: Harmful or not? Why?
Fracture Filling in Alexandrite
Corundum with glass filled fractures and/or cavities enhacing the clarity
No. 84: Jadeite Jade Assemblages
No. 85: Glass Imitations of "Mexican" Opal
No. 86: New Treatment of Natural Ruby
Laboratory Alert No. 87: Highly Radioactive Chrysoberyl Cat's Eye
Detecting HPHT treated Diamonds 
SSEF Swiss Gemmological Institute offers new method for beryllium detection - LIBS Spectroscopy 1,195k
GIA GTL's Color Grading Of Fluorescent Diamonds - Consumer Deception? by Adamas Gemological Laboratory
LMHC Information Sheets
The Laboratory Manual Harmonisation Committee (LMHC) consists of representatives of the following renowned gemmological laboratories: AGTA-Gemological Testing Center (USA), CISGEM (Italy), GAAJ Laboratory (Japan), GIA-Gem Trade Laboratory (USA), GIT-Gem Testing Laboratory (Thailand), Gubelin Gem Lab (Switzerland), SSEF Swiss Gemmological Institute (Switzerland).
Information Sheet 1 March 24, 2004
Corundum with residue from the heating process present in healed fissures and/or cavities
Information Sheet 2 Update December 2006
Corundum - lattice diffusion of foreign elements other than hydrogen
Information Sheet 3 Updated January. 2006
Corundum with glass filled fissures and/or cavities enhancing/modifying the clarity
Information Sheet 4 Updated April 2007
Padparadscha sapphire
Information Sheet 5 Update July 2007
Emerald - fissure filling / clarity enhancement
Information Sheet 6 Implemented January 15, 2007
Paraíba tourmaline
Information Sheet 7 Implemented January 15, 2007
Corundum - No indications of heating and Indications of heating
Wolf Kuehn, F.G.G., F.G.A., Gemmological Consultant GLR&T
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