As a comment about Popcorn (Zea mays subsp. mays 'Glass Gem')
Offered for the first time in 2012 by Native Seeds. This rare heirloom ornamental corn has multicolored kernels that shimmer like glass gems when freshly picked. Only a limited number of seeds were offered the first year, so I saved all of my small crop to plant this year. The color of the ears varies considerably as shown in the photos, but each is beautiful. If you have small children around, then you should consider growing it for them, because each ear you unwrap is a delightful surprise...like Christmas in July! It should also bring a premium at specialty markets. If only the opalescent shine remained after the corn had dried for ornamental use in the fall! Still, dried it makes an attractive display.