Cone 6: Green Opal achieves a vibrant chartreuse gloss when fired. Lighter applications lead to a semi-opaque yellow-green; heavier applications see the formation of a green float.
Cone 10: Color lightens; becomes more transparent.
*The first image is cone 6 and the second image is cone 10.
Tableware producers must test all finished ware to establish dinnerware status, due to possible variations in firing temperature and contamination.