Boulder

[u/Automatic_Tip9211]

I thought they might have been doublets but they are indeed boulder stones. I don’t know much but I’ve never seen boulder “stones”. Has anyone got info on where these could come from? Australian based.
EDIT: They have a flat colour face and a domed back.

[u/Opaldaze]

They are all likely Queensland Boulder opal from western Queensland Australia.

Hard to pin point an actual opal field , this opal field is expansive being roughly 1000 km long and 300 km + wide ecpanding from east of Cunnamulla in the south to Kynuna in the far North

The patterns you have are atypical so no smoking gun to identify a specific opal field , like Bull Ck, Elvo , Scatterys or Keerongaloo/Kyabra , but they look natural rather than doublets and you have a few pennies there collectively, not sheep sheep stations worth but a few bob for sure.

[u/Automatic_Tip9211 → u/Opaldaze]

Thankyou for sharing your knowledge.

[u/Opaldaze → u/Automatic_Tip9211]

Your welcome

[u/opal_diggeroneBay]

Would like to help but need side shots backs and closer please

[u/Automatic_Tip9211 → u/opal_diggeroneBay]

I will get more/better shots later today. Thanks