Amber crystals on green/brown (jasper?)

[BridgetownTreasures]

Another one that grandpa labeled simply “Western OR” The crystals are a bright orange/amber. The rough side with spheroid and wavelite(?) patterns is a pea-green. Someone has gotten a saw into this, but the cut portion seems the least interesting (but what do I know!?) 🤪

 

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[IAMZIM]

That looks a lot like common opal. Hopefully someone with more knowledge can chime in.

 

[niffler]

Looks like opal to me. Opal will be florescent under UV light. Also opal cracks and crazes like in your pics. Some opals that look like yours are faceted into gemstones. https://scottsrocks.com/scotts-blog/74-juniper-mountain-fire-opal

 

[galenrog]

I think grandpa may have occasionally mislabeled things. This type of rock, with amber colored common opal is found in dozens of
locations throughout central and eastern Oregon, plus southwest Idaho. I have never seen a sample from western Oregon, but others may have.

Time for more coffee.

 

[BridgetownTreasures]

I believe that to be the case also. [emoji37]

 

[BridgetownTreasures]

The mis-labeling I mean.

 

[niffler]

Oregon Fire Opal Gems