Recent content by Hyun-Yoon Yoon

The following link may be useful in ... 1. Pearl science laboratory : https://sinjuken.co.jp/book/ 2. Japan precious magazine : https://www.japanprecious.com/ 3. Japan pearl promotion association society : https://jp-pearl.com/ and are running the licence for the pearl expert ...

See the under link. https://www.gia.edu/gia-news-press/hanadama-quality-range-comment-added-to-pearl-classification-reports

Dear everyone, I would like to recommend this free online pearl course. https://www.ssef.ch/courses/pearl-en

Very interesting. thanks for sharing.

And the new book will be released ... http://www.amazon.com/gp/product/1851777555/ref=s9_psimh_gw_p14_d0_i1?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-2&pf_rd_r=0X5VJJZHVE1SZMQVC5WH&pf_rd_t=101&pf_rd_p=1389517282&pf_rd_i=507846

Now, it is possible to buy the book on online store of GIA. http://store.gia.edu/product_p/0201055.htm

Great Video! Thanks for posting.

Hi! Sarah and GemGreek, Yotsuba have a website : http://www.yotsuba.ne.jp/english/ The comany also sells polishing soap for surface abrasion of a pearl. : http://www.yotsuba.ne.jp/english/archives/2006/09/156.html