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Gemmological Services: One of the reasons for Japan's advancement is the availability of modern scientific facilities. At Yama Nishi, the main precious centre, there is a well-equipped gemmological laboratory and other gemmological services are available.Wholesale gemstone jewellery Facilities for research and training in lapidary work, carving, jewellery making etc., have also been established. Elsewhere there are scores of centres for grading diamonds and colored gemstones.

There are many trade organizations that promote various interests.