Boulder opal in WA?

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Boulder opal is not found in WA. Most opal in WA is common opal or fire opal, but precious opal with play of colour was found at the Three Mile Hill Mine, 4.5 km east of Coolgardie. It was first worked in 1904 and last worked 1989, apparently gem opal was found. Don't know much about it and never been there, mindat.org has a web page, https://www.mindat.org/loc-12148.html

If you go and check it out please post what you find, I'm sure others would like to know.
 
I've read about those types of opal but couldn't find anything about boulder opal, it was probably some other mineral. Space is limited, I didn't pick up a sample...
But I took photos of rocks which could be moss opal, found east of kalgoorlie but many kilometres from where the occurences are.
Haven't worked out yet how to upload pics to this forum yet...
 
On outback opal hunters show they were looking for black opal around Laverton I think. Didn't see the end so don't know how they went?
 

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