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| "Excellent service by Mr Tay. Have in-depth knowledge of product. Great job and will introduce service to family and friends" |
- Ms. Ting Lim, Singapore
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| "Dependable assessment of diamond purchased on-line, found to be chipped at the culet. Fortunately, based on this assessment, the retailer agreed to a full refund." |
- Mr. Foo Kean Shuh, Singapore
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| "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
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| "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
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| "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) |
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| "The course was very well run and lecturer is very passionate about Jade." |
| - Kym Hughes, Gemmologist, Symmerty Gemmological and Valuation Services, Australia [Jade Appreciation course]
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| "I have enjoyed the course and found the lecturers, facilities and samples, all of a high standard. I feel I have benefitted in my understanding of this aspect of Gemmology." |
| - Susan Stockmayer, Australia [Jade Appreciation course]
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| "I would like to thank Mr Tay for teaching me a lot of knowledge about gemstone. After I return to Bangkok, I'll be able to share my experience in the class with my colleagues. This is a very good course." |
| - Tamaporn Visuthiprapa (Belle), Sales Executive, Bvlgari, Thailand [Diamond/Gemstone Appreciation course]
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| "Must attend! Interesting and very informative course." |
| - Donna Tay, Customer Service Executive, Bvlgari, Singapore [Basic Diamond + Gemstone course]
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| "Feel honoured to be taught by a very experienced gemologist. A very good entry course for inexperience people." |
| - Koo Wah Yon, Senior Executive, Singapore [Diamond Grading Basic course]
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| "What an eye-opening subject. I like this course very much. Hope to proceed to diploma if there is an opportunity." |
| - Goh Gim Lay, Yong Teck Pawnshop Pte Ltd, Singapore [Diamond Grading Advanced course]
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| "Excellent course; learnt quite a bit on gemstones, the course opened a huge window of knowledge on the world of gemstones. Very interesting lecturer and 'stories of expriences'. Had lots of fun in practicing during the course." |
| -Aaron Koh, Nam Seng Goldsmith, Singapore [Basic Gemstone course]
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| "I really enjoyed the course. It's a great add-on to the Basic Gemstone course. I wish it was longer." |
| - Lisa A. Cunico, TV Producer, Singapore [Advanced Gemstone course]
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| "The Jade course is good as it allows me to know what is the Jade market and what to look for in Jades." |
| - Jessica Chia, Assistant Manager, Ho Bee Goldsmith & Jewellery Pte Ltd, Singapore [Jade course]
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| "This is a good course that help me to grade diamond. It also helps me to know diamond from its imitations." |
- Michael Wong, Singapore
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| 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
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| "... 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) |
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