Periodically, the polisher wiped the stone clean and put on a little water to see if all the lines were gone. If so, then the next finer grit was used. A buffer wheel was used with tin oxide and water ...

The stone to be polished is pressed against this “scaife,” and it’s up to the skill of the polisher to find the grain of the diamond. Polish in the wrong direction and you can damage the ...

Advanced Stone-Polishing Techniques Employed Earlier Than Thought Chinese craftsmen used diamonds and sapphire to polish tools thousands of years earlier than previously believed, according to new ...

The class, offered by the Chippewa River District Library in partnership with Art Reach of Mid Michigan, will be held at the Veterans Memorial Library on Nov. 12 at 2 p.m.