Opal maybe??

[Candie228]

I found this near a pond in Otero county of Colorado. I guessed it was opal...but not sure. Can you help me identify it?

 

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[xr7ator]

All I see is a rock but I'm not the guy to ask. Someone with some knowledge will chime in soon. Wecome to the site!

 

[Kray Gelder]

I'd say common opal is a reasonable guess. The attached matrix looks like volcanic ash, which would be a good indicator.

 

[bradyboy]

nor seeing opal imo