Acari copper district, near Nazca is the source of Andean Opals
, dendritic opals
and Pink opals, which were most likely formed originally in a volcanic lake environment. Opals occur within a few km of the copper mining area. The opal there forms veins up to 5 cm thick.
The area has been producing Pink Opal
for at least 35 years. It is usually pale pink there, but thin veins of dark red-pink were found around 1995. The amount of polygorskite
in Pink Opal
is about 40%.
Ref: J.Hyrsl (2012) Gemstones of Peru, pp. 61, 62