[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.c13.7 # A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c13.7 A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c13.7 - **Language:** English ### [v1.c13.7](https://indike.org/pramana/ins.science.ray-1902.v1.c13.7) "Vaikrānta has 8 faces and 6 angles" &c., (p. 83) possibly refers to a mineral crystallizing in the octahedral form, and of the many minerals crystallizing in this form the family of spinels is more likely to exhibit the great range of colours given. - [Previous: v1.c13.6](https://indike.org/pramana/ins.science.ray-1902.v1.c13.6) - [Next: v1.c13.8](https://indike.org/pramana/ins.science.ray-1902.v1.c13.8) - [Up: v1.c13](https://indike.org/pramana/ins.science.ray-1902.v1.c13) --- Source: [https://indike.org/pramana/ins.science.ray-1902.v1.c13.7](https://indike.org/pramana/ins.science.ray-1902.v1.c13.7) · Pramāṇa