✿◕ ‿ ◕✿

earthstory:

Chrysocolla, with a coating of agate

When grey or golden copper sulphide minerals are oxidised by exposure to hydrothermal fluids, they often form beautiful blue and green secondary minerals. Chryosocolla is one of them, a complex hydrated copper aluminium silicate, often occurring in vugs (the empty centre of geodes and veins) interspersed in the copper deposit. The name dates from antiquity, coming from the Greek chryso (gold) and colla (glue), since it was traditionally used as a flux to separate gold from its ore by smelting.

Keep reading

(Source: facebook.com, via plantyr)