John Sankey on sat 3 nov 07
Feldspars can contain up to 17% potash by weight, but the only
potash feldspars I can find locally or at major mail order places
are Custer's and G-200, both of which are less than 11% potash.
Does anyone know of a mail source of high-potash feldspar?
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John Britt on sun 4 nov 07
John,
I would contact the Custer mine in Custer South Dakota and ask about dental
feldspar.
Hope it helps,
John Britt
www.johnbrittpottery.com
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