2. How to obtain:

Jewelry processing is obtained by cutting purple gems.

Every BOSS who kills the giant dragon soul will get a "dark dust", which can be exchanged for crystal strings in Longmian Temple (right-click to get random number, variety and "heterogeneous" gems) or crystal strings covering the source material (right-click to get random number and variety of "purple" gems).

Note: Cross-service random teams cannot obtain "dark dust". Drawings are exchanged by jewelers for medals (daily currency obtained by jewelry processing) from five outstanding jewelers.