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Old 02-08-2018, 04:03 PM
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Sky Campbell Sky Campbell is offline
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Join Date: May 2002
Location: Gainesville FL
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Denver glass did use new castle stone until it became unavailable. They then asked Norton to supply them with a comparable stone with the same grit. That lasted a while until there supply ran out. At that point the only option was to expensive and the stone wheels were discontinued.

I have one and my curiosity was peaked in this thread so I made the call. Interesting I was told new castle stones changed over the years as the mine became depleted. The deeper they went the more the stone changed. Some of the tells of the age is the color of the stone. All interesting history to me.
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