2.4 grams Gold ore in Quartz - known as Calaverite (item#518)

A really beau tiful pi ece .
This 2.4 grams of Iron Oxide Copper Gold Ore, also known as Calaverite, contains a tiny amount of Quartz and measures 1" x 1/4" x 1/4" (inches).
Our assay tests reveal this type to gold ore to contain: copper, iron, gold , silver, platinum and rhodium.
All the paperwork displayed in the photo, which includes a copy of the assay test from the area of discovery and other valuable information about this piece are also included.
Found near Mount Shasta, California, ( Siskiyou County ) this type of specimen is generally considered to have been formed by extremely high pressure and temperatures. Mount Shasta is a large active volcano (erupting once every 800 to 4500 years) and is very near to where this gold was found.
So what is Calaverite?
Calaverite is a combination of tellurium and gold. Calaverite is the name of a tellurium bearing mineral that occurs in certain low temperature hydrothermal veins, but is also sometimes found in higher temperature veins. It is brittle and has a brassy gold to silver white metallic sheen. It’s appearance sometimes confounded old time prospectors who confused it with pyrite or arsenopyrite. It commonly occurs in the presence of sulfide minerals. Unlike most Pyrites, Calaverite contains significant gold - about 40% gold by weight. With a
... read more