The iris is colored with pastels and glitter, and coated with resin. It's made with gypsum and non-yellowing resin, so it will last a long time without discoloration. These are 14mm eyes with a 7mm iris. I haven't used any photography lights, but I've taken the photos in a bright room. Please note that the colors may not appear exactly as shown in the images depending on your viewing environment. There may be some dust or air bubbles. I've been careful to avoid noticeable bubbles, but please refrain from purchasing if you are looking for perfection. I also sell 18mm, 16mm, and 12mm sizes, so please take a look if you're interested! *The price includes free shipping for doll items, so there are no discounts for multiple purchases. Cast Doll Doll doll bjd Resin