M.J. Hibbard

Gold

Gold   Au    Cubic
o Hydrothermal (epithermal) environment. (chapter 12)
- Gold mantled and alunitized-silicified dacite breccia fragments from Goldfield, Nevada (Florence Mine). Sequence of crystallization in open spaces is gold, then sulfides (black zone), and lastly quartz (white). Slabbed hand specimen is about 10 cm wide. Keck Museum/MSM.

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