Mayamatam 9.115

9.115

vajramindrajaye vidyādindranīlaṃ tumitrake
rudrarāje mahānīlaṃ marakataṃ tumahīdhare

one should know a diamond in Indrajaya, and a sapphire in Mitraka; / a deep blue sapphire in Rudrarāja, and an emerald in Mahīdhara;