Lignum nephriticum cup fabricated from narra wood (the namesake in the province) manufactured opalescent colours when water is poured into it. These wood cups were being a major pre-colonial and colonial industry of Naga. Naga would be the indigenous pre-colonial name of the town. It's named following the narra https://topi88-pragmatic-slot-onl78888.bloggin-ads.com/51583912/the-definitive-guide-to-23naga