[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) › v2.c36.1 # Minerals and Metals in Ancient India v2.c36.1 Minerals and Metals in Ancient India v2.c36.1 - **Language:** English ### [v2.c36.1](https://indike.org/pramana/ins.science.biswas-1996.v2.c36.1) \*Ill. 2.1\* Amethyst 52 x 60 mm. Manganese containing quartz or sphatika. - [Previous: v2.c35.24](https://indike.org/pramana/ins.science.biswas-1996.v2.c35.24) - [Next: v2.c36.2](https://indike.org/pramana/ins.science.biswas-1996.v2.c36.2) - [Up: v2.c36](https://indike.org/pramana/ins.science.biswas-1996.v2.c36) --- Source: [https://indike.org/pramana/ins.science.biswas-1996.v2.c36.1](https://indike.org/pramana/ins.science.biswas-1996.v2.c36.1) · Pramāṇa