Lots of Sparkle

I got the stone on last Friday...it is a beautiful stone with lots of sparkle...when I turned it at certain angle under direct sun light, its fire could actually hurt my eyes!!! Just wondering what is the best angle/environment when looking at a stone? It would be a good idea if Whiteflash could include a pair of sunglasses along with the toolkit for their ACA stones. =D I am satisfied with purchasing at Whiteflash. Thanks a lot for your assistance. Now I am busy looking at different ring settings for the propose..