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Displays a plethora of hexagonal negative crystals - beautiful!
cut: natural crystal
origin: unknown
treatment: untreated
clarity: very distinct inclusions
Large aquamarine crystal with etch figures at both ends. The hydrofluoric acid causing these figures also etched an included, large tourmaline crystal out of the aquamarine. The result is a surface-reaching "negative crystal", a cavity in the shape of the tourmaline crystal which even shows the tourmalines typical striations!
cut: natural crystal
origin: Pakistan, Gilgit, Hunza Valley
treatment: untreated
clarity: very distinct inclusions
Weight 2.250g
cut: natural crystal
origin: Brazil
treatment: heat treated
cut: natural crystal
origin: Brazil
treatment: untreated
clarity: translucent
cut: natural crystal
origin: Brazil
treatment: untreated
clarity: translucent
cut: natural crystal
origin: Brazil
treatment: untreated
clarity: translucent
cut: natural crystal
origin: Brazil
treatment: untreated
clarity: translucent
cut: natural crystal
origin: Brazil
treatment: untreated
clarity: translucent
cut: natural crystal
origin: Brazil
treatment: untreated
clarity: translucent
cut: natural crystal
origin: Brazil
treatment: untreated
clarity: translucent
cut: natural crystal
origin: Brazil
treatment: untreated
clarity: translucent
cut: natural crystal
origin: Brazil
treatment: untreated
clarity: translucent
Rare blue spinel, rough weight 5.13cts, not facettable
cut: natural crystal
origin: Sri Lanka
treatment: untreated
clarity: very, very distinct inclusions