Bicolor Yellow and Pink Pixel Heart in Lab Sapphire 11.9 ct egg This would have likely been

This would have likely been grown by the Czochralski method--it is polished all around and only has minor chipping on the end faces

and with a hardness of 8

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

It fades from a deep blue at the bottom to a lighter purple at the top

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

Bicolor Yellow and Pink Pixel Heart in Lab Sapphire 11.9 ct egg This would have likely beenThis 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.