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Geneva Ruby was the first synthetic gemstone ever produced, a historic rarity!
cut: oval
origin: Switzerland
treatment: Synthetic
clarity: distinct inclusions
Produced in China in the early 1990ies
cut: cabochon oval
origin: China
treatment: Synthetic
clarity: semi-translucent
cut: cabochon oval
origin: China
treatment: Synthetic
clarity: semi-translucent
cut: cabochon oval
origin: China
treatment: Synthetic
clarity: translucent
cut: cabochon oval
origin: China
treatment: Synthetic
clarity: translucent
produced in the 1980ies, from an old gemmological collection
cut: round plate
origin: Switzerland
treatment: Synthetic
clarity: opaque
shows the typical lizard skin effect of early gilson synthetic opals
cut: square
origin: Switzerland
treatment: Untreated
clarity: opaque
cut: square
origin: unknown
treatment: Synthetic
clarity: eyeclean