Pink Opal Crystals Larger Sizes
Although classified as grade C, these pink opal crystals are really beautiful. They're a lower grade because of the mixture of colours and distinctive inclusions.
Pink opal with a higher purity, meaning it's not as heavily included, receives 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.
Most 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.
Opal contains a significant amount of water, usually between 6 and 10%, so it should not be allowed to become dehydrated. Therefore, avoid placing opals in direct sunlight or anywhere too warm.
These tumbled stones are mostly larger sizes, but the size can vary from piece to piece.
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Onyx
