This is a specimen of native copper comprised of dendrites and spinel law
twins. The dominant form of the crystals on the dendrites are distorted cubo-octahedrons.
Origin: Itauz Mine, Djezkazgan, Kazakhstan
Sample size: 3.5 x 2.1 x 0.7 cm
This specimen was collected in December 1998 from 1st level
drift. The copper has an attractive
cuprite
coating giving it an orange appearance.
Analcime
casts up to 1.1 cm are present along with 1
analcime
crystal 0.9 cm across.
Origin: Seneca # 3 Mine, Keweenaw County, Michigan, U.S.A.
Sample size: 5.3 x 2.6 x 1.4 cm
Origin: Cornelia Mine, Ajo, Pima County, Arizona, U.S.A.
Sample size: 19.8 x 14.7 x 2.5 cm
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