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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Opal from
Mt Nelson quarry, Tolmans Hill, Hobart City, Tasmania, Australia


Locality type:Quarry
Classification
Species:Opal
Formula:SiO2 · nH2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Wollastonite1
Vesuvianite1
Grossular1
Data
Mineral Data:Click here to view Opal data
Locality Data:Click here to view Mt Nelson quarry, Tolmans Hill, Hobart City, Tasmania, Australia
Data Identifiers
Mindat Occurrence Record ID:767856
Long-form Identifier:1:3:767856:1
GUID (UUID V4):0
Nearest other occurrences of Opal
3.7km (2.3 miles) ⓘLower Sandy Bay, Hobart city, Tasmania, Australia
8.5km (5.3 miles) ⓘShag Bay, Risdon, Clarence City, Tasmania, Australia
21.3km (13.2 miles) ⓘBoral Quarry, Bridgewater, Brighton municipality, Tasmania, Australia
31.6km (19.6 miles) ⓘLime Bay, Tasman Municipality, Tasmania, Australia
33.5km (20.8 miles) ⓘCygnet district, Huon-Channel region, Huon Valley municipality, Tasmania, Australia
38.2km (23.7 miles) ⓘRosegarland, Derwent Valley municipality, Tasmania, Australia
49.2km (30.6 miles) ⓘForster Prospect, Weld river district, Huon-Channel region, Huon Valley municipality, Tasmania, Australia
87.8km (54.6 miles) ⓘDog's Head Tier, Interlaken, Central Highlands municipality, Tasmania, Australia
References
Bottrill, Ralph S.; Baker, William. E. (2008) Geological Survey of Tasmania Bulletin - A Catalogue of the Minerals of Tasmania No. 73. Mineral Resources Tasmania. 254 pp.
 
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