Cone 06 oxidation: Stormy Blue is a matte, metallic silver and blue glaze with a mottled appearance. Cone 6 oxidation: Color changes to a glossy yellow that breaks over texture; blue crystallization can occur. 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. Not overglaze compatible.