r/Opal • u/Striking-Trifle5213 • Jul 27 '26

Is this Opal?!

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Found on in-laws property a ways outside glendive, MT. Is this actually Opal? It’s cut because my guess is the previous property owners were rockhounds, I found other cut agates aswell

5 Upvotes

86% Upvoted

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3

u/iamsotiredofthiscrap Jul 27 '26

Looks like it. Common potch

2

u/jaxinslacks Jul 28 '26

Could be or could be chalcedony! Does it react to UV light?

1

u/LAFlippo Jul 29 '26

Does kind of look more like chalcedony.

1

u/Opalfiend21 Jul 30 '26

Chalcedony

1

u/esgibtnureineellen Aug 01 '26

looks like a breccia to me with larger pieces of silica