O minerals

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from various origins.

Silica gel with 6 to 20 percent of water.

Chemistry : SiO2
System : Amorphous

Native gold (or)

from various origins.

Hydrothermal mineral concentrate in alluvial deposits.

Chemistry : Au
System : Cubic


from various origins.

Hydrothermal and fumarolic mineral.

Chemistry : As2S3
System : Monoclinic

  Delivery :

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