December 04 - a very important and significant event will take place for the market of stones and jewelry. The National Gemological Association will bring together the best gemologists, dealers and other participants in the precious stones.
Dmitry Tataurov | 28 November 2019, 15:21
From September 17 to September 23. 7 days every day, a live lecture and a theory in a closed group. I tell only about my experience. Only that which is neither on the Internet, nor in books.
Anastasia Fisenko | 15 September 2019, 17:04