Hyalite Opal Specimen - Mexico hematite I suspect this piece may

I suspect this piece may have been acid washed and I have been hearing this is normal for this material although not always disclosed

serene hues

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25inLocality: Sonora

Hyalite Opal Specimen - Mexico hematite I suspect this piece mayHyalite Opal Specimen Hyalite opal is an unusual variety of opal found in various volcanic locations around the world. Because of its unique structure, you won't find any opalescence or "play of color" that traditional opals are known for. Instead, hyalite opal impresses when viewed under both Longwave and Shortwave ultraviolet light, fluorescing a strong green color. Its formation can be classified as amorphous, botryoidal and globular. Its name