Lignum nephriticum cup product of narra wood (the namesake in the province) developed opalescent colours when h2o is poured into it. These picket cups had been A serious pre-colonial and colonial business of Naga. Naga would be the native pre-colonial name of the city. It is actually named after https://topi88menangberapapunpast66555.blog-ezine.com/28242488/23naga-for-dummies