Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Opal from
Pucci drillhole, Hood River County, Oregon, USA


Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Pucci drillhole, Hood River County, Oregon, USA
Data Identifiers
Mindat Occurrence Record ID:953103
Long-form Identifier:1:3:953103:1
GUID (UUID V4):0
Nearest other occurrences of Opal
33.8km (21.0 miles) ⓘNisbet (Oregon Quicksilver), Oak Grove Fork, Clackamas County, Oregon, USA
34.0km (21.1 miles) ⓘKiggins Mine, Oak Grove Fork, Clackamas County, Oregon, USA
41.6km (25.9 miles) ⓘMemaloose roadcut, Clackamas River localities, Clackamas County, Oregon, USA
43.0km (26.7 miles) ⓘTygh Valley, Wasco County, Oregon, USA
43.1km (26.8 miles) ⓘCarpathite occurrence, Cook, Skamania County, Washington, USA
64.1km (39.8 miles) ⓘCinnabar Occurrence, Breitenbush-Austin Hot Springs area, Santiam Mining District (Elkhorn Mining District), Marion County, Oregon, USA
66.5km (41.3 miles) ⓘLivingston Quarry, Orchards, Clark County, Washington, USA
87.3km (54.2 miles) ⓘRichardson Ranch, Madras, Jefferson County, Oregon, USA
87.3km (54.2 miles) ⓘRound Butte Cinder Pit, Jefferson County, Oregon, USA
90.4km (56.2 miles) ⓘThunderegg Deposit, Pony Butte, Jefferson County, Oregon, USA
References
Marshall W. Gannett and Keith E. Bargar
1981 Volcanic stratigraphy and secondary mineralization of USGS Pucci geothermal test well, Mount Hood, Oregon, Open-File Report 81-1330.
 
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