and it turns iridescent with a little help from physics. By Devi Lockwood Earlier this month, Samy Kamkar shared his latest creation on Twitter: chocolate that shimmers like a rainbow. Mr. Kamkar ...

Enter: the "oil slick" trend, a new interior decorating obsession with iridescent rainbow hues, meant to mimic the reflective color scheme of spilled oil or opalescent luster of a unicorn.

is iridescent, but it doesn’t split light into colours of the rainbow so it is not holo. NYX Professional Makeup Strobe Of Genius Holographic Stick - Electric Invasion Iridescent makeup marketed ...