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 Most Expensive House in the United States Costs $250 Million. But that includes a helicopter, $30 million worth of rare automobiles, and seven staff members. With an asking price of $250 million, a 12-bedroom, 21-bathroom mansion in Los Angeles is officially the most expensive house for sale in America. And it was built on spec.. Developer Bruce Makowsky conceived of the property, which reportedly took more than 300 people over four years to build.