Lignum nephriticum cup crafted from narra wood (the namesake on the province) manufactured opalescent hues when water is poured into it. These wood cups were A significant pre-colonial and colonial market of Naga. Naga is the native pre-colonial identify of town. It is actually named after the narra tree https://casper7789909.ageeksblog.com/27623317/23naga-fundamentals-explained