Ok, I've noticed several of these stones eBayed as Thuri's and Eschers in the past year and they always seem to fetch Thuri prices because of confusion/deception.
The 7.5x2 or 8x2" stones that are usually packed in a cardboard box with a rubbing stone and are labeled as Mueller's Water Grindstones Use only with water, etc, etc, are NOT THURINGIANS. These are the stones Mueller digs these days. They are much coarser than Thuringians and are easily available from mueller for 24 Euros. I know. I've bought one (they were about 15 Euro back then). Stop paying $100+ for them.
http://www.mst-mueller.de/
Natur-Wasserabziehstein is what these stones are.
0riginal-Thüringer Wasserabziehstein are Thuringians.
Do you notice how Mueller sells them as two different stones?
The 7.5x2 or 8x2" stones that are usually packed in a cardboard box with a rubbing stone and are labeled as Mueller's Water Grindstones Use only with water, etc, etc, are NOT THURINGIANS. These are the stones Mueller digs these days. They are much coarser than Thuringians and are easily available from mueller for 24 Euros. I know. I've bought one (they were about 15 Euro back then). Stop paying $100+ for them.
http://www.mst-mueller.de/
Natur-Wasserabziehstein is what these stones are.
0riginal-Thüringer Wasserabziehstein are Thuringians.
Do you notice how Mueller sells them as two different stones?