The Precious Ores Diablo III Guide
Last update: 11 May 2016
While exploring the Fields of Misery you may find an entrance to Lost Mine Level 1. Explore the first level and then descend to the second level. You may encounter Tashun the Miner here.
Find metal desposits
Find a clean jewel
The miner will ask you for help in finding two things. Search the entire second level of the mine to locate metal deposits and a clean jewel. They may be well hidden, so you shouldn't be moving too fast.
Kill the Burrowing Leapers
There's one more assignment and that is to eliminate several Burrowing Leapers.
Speak with Tashun the Miner
Return to the miner to talk to him and to end this event. It's worth adding that he's a merchant, so you will be allowed to trade with him.