A true Australian Opal tests between 5.5 and 7.5 on the Mohs' hardness scale. Australian Opals are primarily a sedimentary stone with a low porosity. They are NON Hydrophane as compared to their hydrophane (thirsty) cousins.

You can wear an Australian Opal without concern of it losing color, should it be exposed to humidity/water/skin oils... 

If you purchase an Australian opal from me, I offer to repolish it for free should there ever be a need.

Just wear it and enjoy its durability and beauty!

​

​