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 10 Most Expensive Cities In The World. Tokyo is back on top as the most expensive city in the world, according to new data from the Economist Intelligence Unit. In the company's new worldwide cost of living survey, the Japanese city has outpaced last year's winner Zurich for the undesirable ranking as the world's priciest city.