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While externally similar shapes, these two minerals are very different inside.
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Sauconite from
Motukokako Island (Piercy), Cape Brett, Far North District, Northland Region, New Zealand


Locality type:Island
Classification
Species:Sauconite
Formula:Na0.3Zn3((Si,Al)4O10)(OH)2 · 4H2O
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Sauconite data
Locality Data:Click here to view Motukokako Island (Piercy), Cape Brett, Far North District, Northland Region, New Zealand
Data Identifiers
Mindat Occurrence Record ID:830385
Long-form Identifier:1:3:830385:1
GUID (UUID V4):0
References
Brathwaite, R.L., Isaac, M.J., Challis, G.A., and Brook, F.J., 1990, Tertiary limestone and Zn-Pb mineralized skarn at Motukokako, Cape Brett, Northern New Zealand: Journal of Royal Society of New Zealand, v. 20, p. 427–438.
 
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