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.
Seoul, South Korea, one of the many Asian cities on the list.Creative RF / Getty Images. The investment consultancy firm Mercer has ranked the world's most expensive cities to live in as part of its annual Cost of Living Survey. Contrary to the assumption that Western cities are the costliest, Southeast Asia and Africa feature heavily in the top 19, continuing the trend of emerging markets adjusting to massive outside investment.