Cone 6: Olivine has rusts and several shades of green flow from this mobile gloss glaze. Lighter coats produce muted greens and browns, 3 coats can produce a beautiful metallic green, almost mirror-like, luster. Cone 10: Color flattens and warm undertones come through. TIP: The thinner the application, the more green the glaze will be. The thicker the application, the more brown the glaze will be. If the glaze is fired cooler, the deeper brown and less variation will appear. If too brown, put back in the kiln and fire again.