[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D.](https://indike.org/pramana/ins.science.ray-1902) › v1.c13.9 # A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c13.9 A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c13.9 - **Language:** English ### [v1.c13.9](https://indike.org/pramana/ins.science.ray-1902.v1.c13.9) “Red”—Ruby spinel. - [Previous: v1.c13.8](https://indike.org/pramana/ins.science.ray-1902.v1.c13.8) - [Next: v1.c13.10](https://indike.org/pramana/ins.science.ray-1902.v1.c13.10) - [Up: v1.c13](https://indike.org/pramana/ins.science.ray-1902.v1.c13) --- Source: [https://indike.org/pramana/ins.science.ray-1902.v1.c13.9](https://indike.org/pramana/ins.science.ray-1902.v1.c13.9) · Pramāṇa