Form of opal that forms from out-gassing volcanic vent
Massive hyalite (a colourless form of opal) occurs as globular masses. Hyalite forms in volcanic environments as silica deposits from the gas phase. In this sample, clear globular hyalite is present both on the surface, and in filling vesicles (air pockets) in the volcanic host rock.
This sample of hyalite comes from the Arrowstone Hills, about 10 km northeast of Cache Creek in the Southern Interior region of BC.
Store: Pacific Museum of the Earth, University of British Columbia
Collection: Sutton-Thompson Collection
Accession #: S75-20649
Primary Mineral: Hyalite
Secondary Mineral: –
Site Locality: Scottie Creek
Location: Cache Creek, British Columbia
Special Features: n/a