Intriguing to being with. As Dossta said it is an original take on a pantheon. It would be interesting if there were separate courts for the senses divided in their individual courts yet together in the pantheon by an odd form of harmony.
However, I would like more information on the parental gods as well as why Hyewmor took his mothers eyes and ate them. Was it to gain her unique sight or abilities? Or was it simply out of spite for looking at him differently than his two siblings?
Simple, little flair, and a definite "Here's an idea to give to the annoying player who is greedy!" award.
Cheka had a good thought for a plot hook. How about one of the player character's picks the pocket of the owner of this unlucky gem thinking he is himself very lucky to have acquired it.
Or perhaps the players have been hired to frequent the locked stash of a local and grab a few of his belongings, one of which is the gem that they just can not get rid of. This could have not only the original owner after them but the one who hired them could also be after them for' not giving up the whole treasure so to speak.