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.
The average overall index for US cities and metro areas is 100, so a city with an index of 120 is 20% more expensive than average, and a city with an index of 80 is 20% cheaper than average. See which places made the list Â». View As: One Page Slides. The 15 most expensive places to live in America.