This Finetec Artist Watercolor Refill is made with mica, a naturally occurring mineral that sparkles and shines. Ideal for adding special effects and highlights to watercolor paintings, and also for calligraphy. Mix mica watercolors to create unique shades. Colors adhere to all absorbent surfaces, including paper, wood, and plaster. The Olympic Gold skillet measures approximately 1-1/16 inches in diameter and can be used as a stand-alone skillet or as a replacement.