This Sea Sapphire Can Become Transparent in the Blink of an Eye
Source: http://gizmodo.com/this-sea-sapphire-can-become-transparent-in-the-blink-o-1718968498
Now you see it, now you don’t. But the disappearing act performed by this small sea sapphire isn’t magic: it manage to flex its body to reflect frequencies of light that the human eye simply can’t see.