Illamasqua Hemlock Nail Varnish (£13.50 for 0.50 fl. oz.) is described as a “pale opal green iridescent.” It’s a pale pink-red at one angle, then it turns into a pale, yellowed green shimmer at another angle, while the base color is a pale beige with a hint of pink overall. It’s definitely duochrome, and it is a strong one at that. There are a few green duochromes on the market, but I don’t have one that shifts pink-green (or such a yellowy green at all).