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.
Mar 10, 2016 9:44 am ET. A stronger dollar has propelled New York and Los Angeles into an annual ranking of the worldâs 10 most expensive cities. Singapore took the top spot in the ranking from the Economist Intelligence Unit for the third straight year, followed by Zurich and Hong Kong.