[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) › v2.c32.s16.12 # A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v2.c32.s16.12 A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v2.c32.s16.12 - **Language:** English ### [v2.c32.s16.12](https://indike.org/pramana/ins.science.ray-1902.v2.c32.s16.12) † Garuda lays special stress on the high specific gravity (=4·0) of a genuine ruby. लघुत्वं विजातिलिङ्गं, again गुरुत्वं मणीनां गुणसंग्रहः । While high specific gravity is indicative of the excellence of the gems in general, in the case of diamond it is just the reverse. गुरुता सर्व्वरत्नानां गौरवाधानकारणम् । वज्रे तत् वैपरीत्येन सूरयः परिचक्षते ॥ It is not easy to account for this qualifying clause, seeing that diamond has a sp. gr. of 3·5. - [Previous: v2.c32.s16.11](https://indike.org/pramana/ins.science.ray-1902.v2.c32.s16.11) - [Next: v2.c32.s16.13](https://indike.org/pramana/ins.science.ray-1902.v2.c32.s16.13) - [Up: v2.c32.s16](https://indike.org/pramana/ins.science.ray-1902.v2.c32.s16) ## Cites (1) - [Garuḍapurāṇa](https://indike.org/pramana/in.purana.garuda) — Vyāsa, Sanskrit --- Source: [https://indike.org/pramana/ins.science.ray-1902.v2.c32.s16.12](https://indike.org/pramana/ins.science.ray-1902.v2.c32.s16.12) · Pramāṇa