Gerstley Borate
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Original price
$25.50
-
Original price
$317.00
Original price
$25.50
$25.50
-
$317.00
Current price
$25.50
A sodium-calcium-borate compound used as a low and mid-range glaze flux. This is a conglomerate mineral made up primarily of Colemanite, Ulexite and Hectorite.