Opal Butte Specimen — Oregon Rhyolite, Orange Tones

This Opal Butte specimen also comes from the Butte Mine in Morrow County, Oregon, showing warm orange and yellow tones set naturally into its rhyolite matrix. At 60 by 52mm, it is a stable, well-formed piece from one of the more unusual opal-producing sites in North America.

So what is Opal Butte's story? The deposit formed inside volcanic rhyolite geodes, and while it has been known to collectors since the 1890s, systematic mining did not begin until 1987. Only a small fraction of the material found there shows true play-of-colour, so a stable, well-coloured piece like this represents some of the better material the site has produced.

About this specimen

The warm orange-yellow tone here sits within its natural rhyolite host, giving the piece genuine geological character alongside its colour. Specimens like this are valued by collectors specifically for representing the volcanic environment the opal actually formed in, rather than a cut and polished stone removed from all context. American opal localities like this remain relatively obscure compared to Australian sources, which adds to the appeal for collectors seeking something less common.

• Stone: natural Opal on rhyolite matrix
• Origin: Butte Mine, Morrow County, Oregon, USA
• Size: 60 x 52 x 35mm, 76g (2.7 oz)

Displaying your specimen

A mineral stand or display case out of strong direct sun suits this piece well. Dust gently with a soft, dry cloth, and avoid water or harsh cleaners on this delicate specimen, since opal's internal structure is naturally more sensitive than harder gemstones.

Please note: crystals are not a substitute for professional medical advice, diagnosis, or treatment. Keep small pieces away from young children.