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colemanite vs gerstley borate...is there a real difference?

updated thu 5 aug 99

 

Lois Ruben Aronow on wed 4 aug 99

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After perusing many glaze recipes, and testing more than my share
(with pleasure, I might add), I was just wondering....

It seems many recipes call for actual Colemanite. I know it's common
to sub Gerstley Borate for Colemanite. Is actual Colemanite still
available anywhere? Does it make a difference is you use real
Colemanite instead of GB?

Just wondering. Thanks......Lo