Ratna Pariksha is an ancient science on testing gemstones. It 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. The method was also studied by princes in Karnataka during the medieval period.
The author of this treatise is very commonly known to be Buddha Bhatt. There is also mention of another author in medieval period, Thakkar Pheru, 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.
- Mookerji, Radhakumud (1990), Ancient Indian Education: Brahmanical and Buddhist, Volume 11 of History and Culture Series, Motilal Banarsidass Pub, ISBN 978-81-208-0423-4, retrieved 2009-10-05
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- Johari, Harish (1996), The Healing Power of Gemstones: In Tantra, Ayurveda, and Astrology, Inner Traditions / Bear & Company, p. 202, ISBN 978-0-89281-608-8, retrieved 2009-10-05
- Mubarak, Abu al-Fazl ibn (1551-1602) (1978), The A'in-I Akbari : an encyclopaedia of Hindu philosophy, science, literature and customs, with the life of the author and Akbar's wise sayings, 3, translator: Jarrett, H. S, revised and further annotated by Jadu-Nath Sarka, New Delhi: Oriental Books Reprint Corporation
- Asiatic Society (Calcutta, and Bengal) (1848), Bibliotheca Indica, 270, Calcutta, India: Asiatic Society, retrieved 2009-10-05
- Roger Calverley (2007), Crystal Yoga I: The Crystal Mesa (v. 1), Lotus Press, ISBN 978-0-940985-92-6, retrieved 2009-10-05