Mosan diamond was originally developed by American C3 Company with an investment of 45 million US dollars, and was launched as a patented product in June 1998. In 20 13, it was introduced to the domestic market by the Diamond Council, and the patent protection expired in 20 16, and Mosan diamonds were produced all over the world. Compared with American Mosanite and cvd synthetic diamond, the level of both is almost the same, and even the level of American Mosanite is higher. The technical level of American Mosan diamonds has reached DF color, excellent cutting and FL/IF clarity grade.