Diamond

Plate of HPHT grown synthetic diamond with nickel inclusions. Photo by Wilma Van Der Giessen

Corundum

Flux in Synthetic flux Ruby

Beryl

Typical fingerprint in Synthetic flux Emerald

Cubic Zirconia

GGG

YAG

Rutile

Spinel

Quartz

Moissanite

Strong-birefringence-in-synthetic-Moissanite.-Photo-by-Protopapas

Opal

Alexandrite

Flux in Synthetic Alexandrite. Photo by Monica Renna And Salvo Castelli
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