Gemstone Eggs, Faceted Garnet Sapphire Perovskite Lab Crystals Weight and Size:Nd:YAG Long Egg, 34.1×23.1mm, 213ct In practical terms that means

In practical terms that means it has incredible fire - it briefly was attempted as a diamond imitation

While facet-grade sphalerite is only rarely found in nature (and usually has a dark red or orange color)

when doped with praseodymium instead you get this very odd multifluorescence: longwave UV gives a pale green

The only limiting factor is its rarity which has kept it more obscure than gems like ruby and sapphire

Gemstone Eggs, Faceted Garnet Sapphire Perovskite Lab Crystals Weight and Size:Nd:YAG Long Egg, 34.1×23.1mm, 213ct In practical terms that meansThese are gemstone eggs, faceted from different lab grown crystals. Each is an exquisite and unique work of art with tons of facets and unmatched brilliance! Eggs are currently available in purple laser garnet (nd: YAG), laser perovskite (Nd+Ce: YAP) and colorless lab sapphire. We have two pairs of sapphire egg halves with polished hollows! These could be used to store your most precious items.