sentences:  Today almost all the silver produced in Utah comes from the Bingham Canyon Mine, which produces silver as a byproduct of copper mining.Virginia has produced about 90 thousand ounces of silver as a byproduct of mining other metals.The Chewelah district in Stevens County produced 1.7 million troy ounces (53 metric tons) of silver and 5,000 metric tons of copper from quartz-carbonate veins.