Pink Opal Crystals from Peru

Although classified as grade C these pink opal crystals are really beautiful.  The reason they're a lower grade is because of the mixture of colours and distinctive inclusions.

Pink opal that's purer meaning material is not as heavily included is given a higher grade.  Uniformity of colour is also important.

Much of the opal mined around the world is common opal.  Unlike the precious variety it does not exhibit 'play of colour' or iridescence.  The chemical composition of these two types of opal is almost identical. 

The vast majority of pink opal comes from the western foothills of the Andes in Peru.  It can also be found in smaller quantities in Western Australia and Mexico.  

Opals contain a significant amount of water usually between 6 and 10%.  They should never be allowed to become dehydrated.  For this reason avoid placing stones in direct sunlight or anywhere too warm.    

Although classed as a large sized tumbled stone size can vary from piece to piece.

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