Lignum nephriticum cup manufactured from narra Wooden (the namesake in the province) created opalescent shades when water is poured into it. These wood cups were A serious pre-colonial and colonial industry of Naga. Naga may be the indigenous pre-colonial title of town. It's named following the narra tree (Pterocarpus https://igm247-alternatif52479.blogitright.com/28262280/not-known-factual-statements-about-23naga