13.21 CTS A GRADE BLUE PERU OPAL ROUGH WITH DENDRITIC INCLUSIONS [VS8011]

PERU  BLUE OPAL ROUGH 
A grade with dendritic inclusions

Peru blue opals were found in 1983 in a cooper mining operation in Lima Acari-production has now ceased. The colours range from neon blue to mint green to clear with all shades in between.Some have dendtritic [fern like] inclusions that make interesting stones. It is fine traces of copper trapped in the crystal structure thats gives it the color.
The rough has been taken dry.
Sky blue colour.

DENDRITIC  The patterns are found in microscopic fissures that cause them to branch out like tree limbs or fern like which is usually a iron silcate.

We have taken the photo wit the rough wet

 

This is the national stone of Peru