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.
Los Altos, Calif. â 40 miles south of San Francisco â was the most expensive market nationally, with an average listing of $1.96 million. In contrast, Hartford â the least expensive Connecticut market â was ranked the 56th most affordable market nationally in the survey.