Opal Butte Specimen — Oregon Rhyolite, Orange Tones aventurine pyramid patches inside the glass slowly

patches inside the glass slowly begin to crystallize after all

It makes a genuinely thoughtful housewarming gift

a genuine museum-scale piece in the soft natural sky-blue this rare material is prized for

and size is expected from piece to piece

entirely natural and neither dyed nor colour-treated

Opal Butte Specimen — Oregon Rhyolite, Orange Tones aventurine pyramid patches inside the glass slowlyThis 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