The legendary "nine gems" (navaratnas), nine learned men said by tradition to have adorned the court of a king Vikramaditya, conventionally identified with the Gupta ruler Chandragupta II (whose title was Vikramaditya).
The navaratnas as a marker of the Gupta golden age, the identification of Vikramaditya with Chandragupta II, and the individual gems Kalidasa, Varahamihira, Amarasimha and Dhanvantari are recurring static facts.
This Vikramaditya (Chandragupta II, Gupta age) is conventionally linked to the navaratnas, but the legend conflicts with the Vikrama era of 58 BCE; the term navaratna is later also used for Akbar's nine courtiers, a separate Mughal-age group.
Nine gems traditionally at Chandragupta II Vikramaditya's court, including Kalidasa, Varahamihira, Amarasimha and Dhanvantari.