This curved piece of purple/amethyst glass was found during demolition of a house in Colombia. It resembles the shape of a roofing tile, but I have no clue what it actually is, and using the hand size as a guide, it looks too small and perhaps too delicate to be a roof tile, but maybe a skylight tile? Does anyone know for sure what this is, how it might have been used, and if it has any monetary/collector value? Thanks in advance for any help that you can offer!