[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.c45.s2.2 # Minerals and Metals in Ancient India v2.c45.s2.2 Minerals and Metals in Ancient India v2.c45.s2.2 - **Language:** English ### [v2.c45.s2.2](https://indike.org/pramana/ins.science.biswas-1996.v2.c45.s2.2) Emerald was known as tārkṣya, garuḍodgāra, etc. Cat’s eye gem was called viduraka. Diamond was known as vajra as well as bhidura. Diamond was classified under three ‘genders’: masculine, feminine and neutral as well as under four conventional castes (RRS, 4.26-4.30). - [Previous: v2.c45.s2.1](https://indike.org/pramana/ins.science.biswas-1996.v2.c45.s2.1) - [Next: v2.c45.s2.3](https://indike.org/pramana/ins.science.biswas-1996.v2.c45.s2.3) - [Up: v2.c45.s2](https://indike.org/pramana/ins.science.biswas-1996.v2.c45.s2) ## Cites (1) - [Rasaratnasamuccaya](https://indike.org/pramana/in.med.rasa.samuccaya.pramukha.rasaratnasamuccaya.4.26) — Vāgbhaṭa (alchemist), Sanskrit --- Source: [https://indike.org/pramana/ins.science.biswas-1996.v2.c45.s2.2](https://indike.org/pramana/ins.science.biswas-1996.v2.c45.s2.2) · Pramāṇa