For the written pattern by Purpleiguana, check out the link below, and below that I have a second video showing how to alter this pattern into a more symmetrical crescent moon shape - ... ...
by BAG-O-DAY CROCHET & MORE
by crochet-crosia
by lacefromireland
by 4Elli. com Crochet
by Tejido Crochet
by Handmade by LovelyMiracle