Northern COMSTOCK Hi-Grade Silver-Gold Ore MMSN8

http://comstockgold.blogspot.com/2010/06/mmsn8-n-comstock-high-grade-silver-g...
Visible free gold is centered in the high grade silver mineral, the very dark Stephanite with a dark blue cast. Surrounding the Stephanite is the lighter gray, silver mineral, Argentite.
Splotching around that and in between are yellowish-orange quartz-like portions that can be Electrum, a natural alloy of gold and silver.
Dark and light gray minerals are often high grade silver minerals as noted in the placard.

Electrum from alluvium placer of a river was used to make the world's first minted gold coinage in the region of present day Turkey.

Typical ore minerals found in the northern part of Comstock Lode Mining District: Argentite, Stephanite, Electrum and native Gold. More info at
http://comstockgold.blogspot.com/p/mineralogy.html

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