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Outstandingly fine and large black opal. Impressive play of colour in red, green, blue and orange. Do look at the videos!
cut: cabochon oval
origin: Ethiopia
treatment: Smoked
clarity: translucent
From old stock. Some slightly abraded facet edges
cut: emerald cut
origin: Brazil, Ouro Preto
treatment: Untreated
clarity: very very small inclusions
cut: oval
origin: Brazil, Ouro Preto
treatment: Untreated
clarity: eyeclean
cut: pear
origin: Sri Lanka
treatment: Heat treated
clarity: very small inclusions
cut: cabochon oval
origin: India
treatment: Untreated
clarity: very distinct inclusions
cut: cabochon oval
origin: India
treatment: Untreated
clarity: very distinct inclusions
cut: cabochon oval
origin: Tanzania
treatment: Untreated
clarity: translucent
cut: cabochon oval
origin: India
treatment: Untreated
clarity: very distinct inclusions
cut: cabochon oval
origin: India
treatment: Untreated
clarity: very distinct inclusions
cut: cabochon oval
origin: India
treatment: Untreated
clarity: very distinct inclusions
cut: cabochon oval
origin: India
treatment: Untreated
clarity: very distinct inclusions
cut: cabochon pear
origin: India
treatment: Untreated
clarity: very distinct inclusions
cut: cabochon trillion
origin: India
treatment: Untreated
clarity: very, very distinct inclusions
cut: square
origin: unknown
treatment: Untreated
clarity: small inclusions
cut: square
origin: unknown
treatment: Untreated
clarity: very small inclusions
cut: square
origin: unknown
treatment: Untreated
clarity: very distinct inclusions
cut: square
origin: unknown
treatment: Untreated
clarity: very, very distinct inclusions
Attractive greyish green colour
cut: square
origin: unknown
treatment: Untreated
clarity: small inclusions
cut: square
origin: unknown
treatment: Untreated
clarity: very distinct inclusions
cut: cabochon oval
origin: Iran
treatment: Surface hardened w. resin
clarity: opaque
B quality, slightly greenish and speckled
cut: cabochon oval
origin: Iran
treatment: Surface hardened w. resin
clarity: opaque
cut: square
origin: unknown
treatment: Untreated
clarity: small inclusions