Thanks so much with the advice and I will try to get better pictures on here soon!
mart: I had the same experience googling this term. I have studied the letters many times and am fairly confident I have the letters right. The term I do get a hit on is Chalchicueyecan, which seems to relate to an area of Mexico near Veracruz. Alternatively, I have had hits on a slightly different spelling, Chalchique, which appears to be a river in El Salvador. Also, google has helped me discover an Aztec goddess named Chalchiuhtlicue which is interestingly similar.