Cone 6 (1st photo): Blue Surf is a variegated cobalt blue glazes that breaks green.
Cone 10 (2nd photo): Color darkens.
TIP: The thinner the application the the more green the glaze will appear. The thicker the more blue it will be. Where the glaze breaks it will be green.
Comes in a 16 oz wide-mouth jar. Dinnerware safe.