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 least expensive cities, including rent, are Kiev and Sofia. Check out this chart below to see the relative wage levels of the top 10 most expensive cities based on UBSâ research, which places Zurich and Geneva at the top and New York City as No.3.