This specimen features a cellular mass of micro-crystallized, dull yellow-green corkite with minor quartz. It represents a fine-grained, massive example of corkite, an uncommon secondary mineral found in the oxidized zones of hydrothermal base-metal deposits. While not particularly visually striking, corkite is relatively rare and valuable for collectors of secondary minerals.
Corkite forms in the oxidized zones of lead-zinc-copper veins, often occurring as friable massive aggregates. It is typically associated with other secondary minerals like anglesite and osarizawaite. This specimen comes from a region known for corkite and was acquired by Dr. Tarassoff in 1969 as a gift from Professors Yazawa and Nambu of the Research Institute of Montreal Dressing and Metallurgy, Tohoku University, Japan.
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