Opal Shells are shells that have been opalaized.Most opal shells are from Coober Pedy opal fields and few black opal shells from Lightning Ridge are very valuable.
Outback deserts of Australia were once under the sea, that is why we now find shells Opalized in the deserts. Source your Opal Shells opals direct from opal miners and opal wholesalers and dealers for your single gem opal shell or parcel opal shells.
The Australian outback used to be an inland sea, but now its hot dry deserts where opal miners dig for opalised sea shells ., it is still rare to find good opalised shell with good colour and small amount of potch.
Most shells are found in patches and are not spread thought the mine but found in small areas only. Good shells are worth more if left natural and not polished for collectors.