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.
Of the 10 most expensive cities, five are in Asia. Singapore came out at No. 1, followed by Hong Kong. The third-most expensive city is Zurich, Switzerland, the city with the highest cost of living in Europe. Tokyo and Osaka, both in Japan, are fourth and fifth, followed by Seoul, South Korea. Geneva, Switzerland, and Paris tied for seventh, and New York and Copenhagen tied at No. 9.