Bicolor Yellow and Pink Pixel Heart in Lab Sapphire 11.9 ct egg and which color predominates depends

and which color predominates depends on the lighting (color and angle) as well as the background it is set against

The stones have a rich peachy-pink color-changing padparascha-like color

This is a real lab grown alexandrite (not one of the many simulants) which was faceted from a laser crystal top

Colorless lithium niobate was once popular as a diamond simulant but it really isn't that good of one simply because it's much brighter and more dispersive than a diamond

Bicolor Yellow and Pink Pixel Heart in Lab Sapphire 11.9 ct egg and which color predominates dependsThis is a custom cut pink and yellow lab sapphire done in a pixel cut tablet heart. When held up in front of you it makes a sort of pixelated version of what's behind it. It weighs in at 11. 9ct and measures 14. 75x14mm.