History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c29.s1.4
History of Chemistry in Ancient and Medieval India, Incorporating the History of Hindu Chemistry by Acharya Prafulla Chandra Ray c29.s1.4
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c29.s1.4
("Diamonds, white like the conch, water-lily or crystal, are *brahmanas*; those, which are red like the eyes of the hare, are *kshatriyas*; those, which are verdant like the cool plantain leaf, are *vaisyas*, those, which resemble in colour the clean sword, are known as *sudras*"—*Manimala*, a treaties on gems, by S. M. Tagore, p. 100.)