[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.c12.t3.63 # A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c12.t3.63 A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c12.t3.63 - **Language:** English ### [v1.c12.t3.63](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t3.63) Rājāvarta (Lapis lazuli) has a bluish tint but with slight admixture of red.........it is killed by being powdered in combination with lemon juice and sulphur and roasted 7 times in a covered crucible. - [Previous: v1.c12.t3.62](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t3.62) - [Next: v1.c12.t3.64](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t3.64) - [Up: v1.c12.t3](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t3) --- Source: [https://indike.org/pramana/ins.science.ray-1902.v1.c12.t3.63](https://indike.org/pramana/ins.science.ray-1902.v1.c12.t3.63) · Pramāṇa