Journeyman 3 :The Red Stone?

Hi: I'm starting to place the colored stones in the budda's, after I pluged in the white stone, next should be the red stone. However, I don't have a red one in my inventory nor do I recall collecting one. Where is it to be found? I'm following the GB W/T and don't see what era it is in. Please advise.

Thanks,
GoGirl

Use the Tunnel System in the Himalayan Age to steal Genghis' sword without him noticing. You should have retrieved a map in the greenhouse to help you along in the tunnel system. All the stones are in the Himalayan Age. There is no need to go to another age. Good Luck!