Wikipedia:Picture peer review/CZ brilliant

 
Due to its low cost and close visual likeness to diamond, cubic zirconia has remained the most gemologically and economically important diamond simulant since 1976.

I think this stands up to Featured criteria. It has a decent resolution and beautiful lighting refractions. It's used in Zirconium, Cubic zirconia, Zirconium dioxide, and Diamond simulant. It was originally uploaded in 2004 by User:Hadal.

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