@gemsofscience: check it out, polarized sky light! this slice of laser ruby shows both pleochroic colors when rotated because of that. laser ruby will typically have the c axis oriented at around a 60 degree angle to the length for best yield when cutting rods, allowing this effect. we just got some fresh material in as well as some stunning deep blue sapphire used in medical flashlamps for skin treatment and hair removal. keep an eye out for trimmed rough this afternoon! #labcreated #syntheticgems #gemsofscience #ruby #sapphire #Science #optics