Cone 6: Azurite is a soft matte, cobalt blue glaze that will pool dark and glossy and break a light brown. Cone 10: Color changes to green where thin/breaking and remains dark blue where thick/pooling. Increased movement. Tip: This glaze can be very mobile; Recede coats to avoid run off on vertical pieces and practice caution in combination. Note: Not recommended for dinnerware due to surface durability.