With no explanation, label text_A→text_B with either "DON'T KNOW", "NO" or "YES".
text_A: Arizona is currently the most important producer of turquoise by value. Several mines exist in the state, two of them famous for their unique colour and quality and considered the best in the industry: the Sleeping Beauty Mine in Globe ceased turquoise mining in August 2012. The mine chose to send all ore to the crusher and to concentrate on copper production due to the rising price of copper on the world market. The price of existing Sleeping Beauty turquoise in its processed, semi-precious gem quality state has risen dramatically since the mine's closing, even as the broader market for turquoise remained stagnant. The Kingman Mine as of 2015 still operates alongside a copper mine outside of the city. Other mines include the Blue Bird mine, Castle Dome, and Ithaca Peak, but they are mostly inactive due to the high cost of operations and federal regulations. The Phelps Dodge Lavender Pit mine at Bisbee ceased operations in 1974 and never had a turquoise contractor. All Bisbee turquoise was "lunch pail" mined. It came out of the copper ore mine in miners' lunch pails. Morenci and Turquoise Peak are either inactive or depleted.
text_B: If a reader or a relative had a piece of treated and polished Sleeping Beauty turquoise that was set in jewelry, could he or she potentially benefit from the price rise that this passage refers to?
YES.