120 Days to maturity. Zea mays ’Rainbow Jewel Popcorn’. Rainbow Jewel Popcorn Corn Seeds. Non-GMO, warm weather hybrid annual. Rainbow Jewel Corn is a hybrid cross between a white popcorn variety and a glass gem corn variety. This combination gives the corn kernels the ability to be popped and have a gorgeous, rich coloring that leaves no two cobs the same. Equal parts ornamental and useful, these corn plants are sure to be a hit this fall! ~ 150 seeds/oz.