Star Ruby's (Harshil Jeweller's of Mumbai, India) and Alfo Gems of Bangkok, Thailand are marketing "Cat's Eye Alexandrite loose gems. Star Ruby says they are all true Chrysoberyl Alexandrite Color Change Cat's Eyes from Orissa Mines there in India, while Alfogems claims theirs are from Brazil. Both sell through websites as well as on EBay. Both claim their 3+ carat gems are true color change Alexandrite Cat's Eyes (Chrysoberyl). I would like your opinion on these two marketers of Alexandrite Cat's Eyes. I have bought from Star Ruby once on a Star Ruby, but have never bought from Alfo Gems.