Green Stone Quest Walkthrough
Jeweller Mim will visit you and ask to bring her an emerald. To complete the quest, buy some green quartz from any merchant in town and give it to Mim. She will be waiting not far from the throne room, in the city square.
Green quartz does not work (v 1.1.5). Perhaps this was a big that was fixed in a patch between October and late December.
Mim was located in one of my towns, not in the capital, and certainly not near the throne room, even though she starts this quest in the capital.
It is an emerald that is needed and can be found in the village you build in the region silversteps she will become an artisan for you and make one magical item a month for you.
Right on point Jeff. Thank you.