[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.c13.15 # A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c13.15 A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c13.15 - **Language:** English ### [v1.c13.15](https://indike.org/pramana/ins.science.ray-1902.v1.c13.15) 8 Faces and 6 angels” might possibly also refer to the hexagonal prism with basal planes, a common form of corundum, which gives the variety of colours referred to even more perfectly than the spinels. - [Previous: v1.c13.14](https://indike.org/pramana/ins.science.ray-1902.v1.c13.14) - [Next: v1.c13.16](https://indike.org/pramana/ins.science.ray-1902.v1.c13.16) - [Up: v1.c13](https://indike.org/pramana/ins.science.ray-1902.v1.c13) --- Source: [https://indike.org/pramana/ins.science.ray-1902.v1.c13.15](https://indike.org/pramana/ins.science.ray-1902.v1.c13.15) · Pramāṇa