Ratna Pariksha is an ancient science on testing gemstones. This art was used by Kosadhyaksha (Superintendent of Treasury) mentioned in Kautilya's Arthashastra in order to control business of pearl, diamonds and all important gems in the ancient times. It classifies gemstones into Maha-Ratna and Upa-ratna
Ratna Praiksha is mentioned in Kautilya's Arthashastra (323-299 B.C.). Vatsayana of Kamasutra mentions about rupa-ratna-pariksha. This subject was also studied by princess in Karnataka, India in the Medieval times. The author of this treatise is very commonly known to be Buddha Bhatt. There's also mention of another author in medieval period Shri Thakkar Peru who is again credited to have worked on this subject. There's a mention of Vaidyaraj Shri Radha Krisha Navetia who uses Ratna Pariksha for preparing a type of alcohol meant in the use of gem therapy.
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