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.
Most Expensive Cities In The US If you are looking to go on vacation in the United States and budget is not a concern, take a look at the top expensive cities in the US for vacations. Golden Gate Bridge - San Francisco