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.
London, United Kingdom. Having been rated as the worldâs most expensive city to visit for 24 hours it should come as no surprise that London would be on this list somewhere. What may be surprising to some of you, however, is that there are at least 24 cities even more expensive. Brisbane, Australia.