Mineral resource classification is the classification of mineral deposits based on their geologic certainty and economic value.
Here's a list of the top 10 most expensive cities in the country, ranked by average monthly rent for a single person: 1. San Francisco, $2,077. 2. New York City, $1,994. 3. Boston, $1,721. 4. Washington, D.C., $1,397. 5. Seattle, $1,288.
Sep 22, 2015 10:08 am ET. New York City takes the top spot in the annual ranking of the worldâs most expensive cities, according to an analysis by UBS. To Read the Full Story, Subscribe or Sign In.