Find a Medieval Mine
Challenger: Lady Carowyn Silveroak
Research a mine that was known in the period we study, then collect some of the kind of material that mine produced (Bonus points for finding some from the actual mine!). Make something from that material that duplicates something known from the area of that mine. (Bonus points for using period tools and techniques.)  Please document your process as much as you can.
For a good starting point, see materials referenced here or email the challenger
Winner will receive a chunk of AAA grade Afghani lapis lazuli or a chunk of Libyan desert glass, both known in period, winner's choice (documentation available!)
Contact challenger Carowyn Silveroak at