LAB

"Mr. Tay had been most professional and most importantly, unbiased, in his inspection of diamonds and gemstones. It is indeed very hard to find someone of his calibre in Southeast Asia. Cheers to Mr. Tay Thye Sun"

- Mrs Julia Goh, Singapore

"Thank you Mr. Tay. Fortunately, I got a full refund on the "pearls" and the judge ruling was based on your certificate. Thanks again for your help. (the pearls are plastic imitation pearl)

- Mr. Werner Holzhauser, Germany

"His gem testing laboratory has ISO accredition since 1998. Recognized throughout Asia for the integrity of his laboratory service, Mr. Tay has shared his gem laboratory research through numerous published articles, and as a guest speaker in Tokyo, Beijing, Idar-Oberstein, Taipei, Bangkok, Yangon, Kuala Lumpur and Bombay.

- GIA GemFest 2000 (Leadership Presentations)

EDUCATION

"This is a good course that help me to grade diamond. It also helps me to know diamond from its imitations.

- Michael Wong, Singapore

I am writing on behalf of all the participants from various universities and also the Ministry of University Affairs to thank you very much for your lecture. [click to read more]

- Dr Wichian Magtoon, Associate Professor, Srinakharinwirot University, Thailand

"... it did provide many members of our industry with the opportunity to hear and discuss issues of real interest and importance to them. I am sure that all those who attended your session benefited greatly from being there."

- Mrs. Jannette Lenartas, Federal President, Jewellers Association of Australia, Australia. Asia-Pacific Economic Conference (APEC 2000)

RESEARCH

"The sharing of your expertise and veiwpoints on the "Identifying Rubies by the PIXE technique" has been tremendous value to the participants..."

- Dr. Sunee Sriorathaikul, President Thai Gem and Jewelry Traders Association, Thailand.

"Please accept not only my genuine thanks, but also my enthusiastic congratulations on your latest results of interesting research of the chemical distinction between rubies from Burma and Thailand." [click to read more]

- Dr Edward Gubelin, Honorary Professor of the University of Stellenbosch, Switzerland