[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [Minerals and Metals in Ancient India](https://indike.org/pramana/ins.science.biswas-1996) › v1.c19.s2.2 # Minerals and Metals in Ancient India v1.c19.s2.2 Minerals and Metals in Ancient India v1.c19.s2.2 - **Language:** English ### [v1.c19.s2.2](https://indike.org/pramana/ins.science.biswas-1996.v1.c19.s2.2) Period I — Ochre Colour Pottery (OCP) Period II — Black- and red-ware (B & RW) Period III — Painted grey ware (PGW) Period IV — Northern Black Polished ware (NBPW) - [Previous: v1.c19.s2.1](https://indike.org/pramana/ins.science.biswas-1996.v1.c19.s2.1) - [Next: v1.c19.s2.3](https://indike.org/pramana/ins.science.biswas-1996.v1.c19.s2.3) - [Up: v1.c19.s2](https://indike.org/pramana/ins.science.biswas-1996.v1.c19.s2) --- Source: [https://indike.org/pramana/ins.science.biswas-1996.v1.c19.s2.2](https://indike.org/pramana/ins.science.biswas-1996.v1.c19.s2.2) · Pramāṇa