Gemstone Authenticity & Certification
GIE(Gemological Institute of Excellence),
GIA (Gemological Institute of
America),
IGI (International Gemological Institute),
GRS (Gem Research
Swiss Lab),
AIGS (Asian Institute of Gemological Sciences)
GII
(Gemological Institute of India),
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Apakah Peningkatan Batu Permata ( Gemstone Enhancements) ? Peningkatan batu permata digunakan pada permata untuk meningkatkan penampilan ...
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