A History of Indian Medical Literature v3.c49.s1.41

v3.c49.s1.41

A particular gem, called bhallāta, is said to resemble an emerald (III, 201). Three kinds of sphaṭika are described: mandakāntika (found in the Vindhyas), a black kind (found in Sri Lanka), and jyotīrasa; the last kind is of three varieties: rājāvarta, rājamaya and brahmamaya (III, 236). Upala is of three kinds: marmarāśman (chalcedony), varopala (opal) and rudhirapālaṅka (agate); a white marmarāśman is called karpūramaṇi; a black variety of upala is called bhramaramaṇi (III, 257–258).