these were a gift to my 11 year old from her grandma. my daughter has recently become allergic to everything except gold, poor thing. so her earrings collection was passed on to her little sister (who was very happy, of course!) the color of the created opals is just what the finest opals would be, lovely flashes of rainbow. the setting on the earring itself is great, and these are a wonderful size. the backings are pretty bad, though. luckily i have a bunch of the clear rubber stoppers (to keep my girls from losing all their earrings!). my daughters prefer them anyway, they find butterfly backs to be uncomfortable. so we took the backs off, stuck them in her jewelry box and she wears these with clear rubber stoppers. problem solved.