Cone 6 oxidation: Oyster is a variegated cream/brown glaze that exhibits gray/purple undertones and breaks brown.
Cone 10 reduction (second image): Color changes to a variegated brown/cream. Increased movement.
TIP: If your kiln fires cool the glaze finish can be brown. If your kiln fires hotter you can get an iridescent finish. Re fire piece if you don’t desire the brown finish you get when it is fired cool. This glaze has a gloss finish. If you like Green Tea and Capri Blue combos, then try oyster because these three glazes are in the same glaze family.