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.
With a cost of living index of 178.6, Brooklyn, New York, ranks as the second most expensive place to live in the U.S. The Council for Community and Economic Research has ranked the birthplace of Barbra Streisand as the second most expensive city in the U.S. every year since 2007.