Color Change Sapphire, Vanadium-Doped Lab Gem Stone:Diamond Cushion, 11.4×9.7mm, 5ct and on top of that

and on top of that has four perfect cleavage planes - it wants to break into perfect octahedrons

These are Pyropearls™

pink/red stones with a ton of scintillation and super bright fluorescence which gives them an extra pop

However it turns out it is only almost impossible

Color Change Sapphire, Vanadium-Doped Lab Gem Stone:Diamond Cushion, 11.4×9.7mm, 5ct and on top of thatThese are faceted stones cut from Vanadium doped color change sapphire. It has a cool color change from blue under normal lighting to purple under warm lighting, with a nice greenish purple hue under fluorescent lamps. This material is sometimes incorrectly sold as 'alexandrite', and since mislabeled stones were sold on cruise ships in the 70's and 80's jewelers sometimes call it "grandma's alexandrite". Personally, I think this is cool enough that