Cone 06 oxidation: Oyster Shell is a glossy, pale gray glaze that breaks a darker gray. Semi-Transparent at 3 coats. Cone 6 oxidation: Color changes to an opaque cream that breaks over texture and pools white. Enhanced mobility. Surface issues may occur. TIP: This glaze WILL move. Take care when using on vertical pieces reduce glaze thickness towards the bottom third to minimize run-off. Overglaze compatible.