What is sterling silver?
Sterling silver is the standard of quality for articles containing 92.5% silver and 7.5% copper (and/or other alloys).
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EarthWord - Mother Lode
Happy Mother's Day from EarthWords!
EarthWord – Ore
The naturally occurring material from which a mineral or minerals of economic value can be extracted. Usually minerals, especially metals, are mined first in ore form, then refined later.
Copper
Zambia is the eighth largest copper producer in the world. USGS assessments estimated that the potential for undiscovered copper deposits in Zambia is larger than once thought. Photograph credit: USGS
Silver metal specimen
Silver. Pen for scale. Mineral collection of Brigham Young University Department of Geology, Provo, Utah. Photograph by Andrew Silver. BYU index 1-4112b, Ag.