The Narrow Sea. The only thing that separate Westeros and Essos. While easy enough to cross, it makes warfare between the Seven Kingdoms and the Free Cities difficult. The Dothraki are afraid of it, and Robert is afraid of what lies beyond. That's probably wise, considering Braavos has the largest and most powerful Navy force on the Narrow Sea. And then there are the hundreds of thousands of tribal horse-worshippers that wouldn't be squeamish about plundering a kingdom or two. If, you know, they weren't afraid of the frickin' water.
A lush, rich turquoise as deep as the sea at the end of the world. More green than blue, with gleaming seafoam highlight and a glimmer of aqua sparkles. Goes on opaque and smooth for even coverage. Can be used wet as an eyeliner.
Across the Narrow Sea as listed is in a 5gr jar with sifter and screw-on lid.