In his workshop he said he's using nickel silver and ceramics as raw materials for the altar.

CNN: Mexico spends millions to greet pope

Many French horns, for example, are made of nickel silver, an alloy of copper, zinc, and nickel (it's silver in name and color only), and some are made of nickel bronze, an alloy of copper, tin, and nickel. (Brass itself is an alloy of copper and zinc.) Many brass instruments are silver-plated (sterling silver on brass), and some are gold-plated.

NPR: Young Tuba Player Gets Nod from Phila. Orchestra

The sludge inside the tank contains chunks of solids, many common metals including aluminum, nickel, lead, silver, copper, titanium, and zinc and other common elements.

FORBES: What's Inside The Suspect Nuclear Waste Tank At Hanford?

That means it will store your ounce of silver for a nickel a year.

FORBES: Personal Finance

Other commodities like gold, silver, copper, nickel, all are in high demand, and therefore really expensive.

NPR: Marketplace Report: China's Growth and Oil Prices

The use of maillechort, a tarnish-resistant, creamily beautiful but easily marred alloy of copper, zinc and nickel, sometimes also called "German silver, " for the plates and bridges is a case in point.

FORBES: It's About Time

As of late morning in New York, all four of the precious metals and all six of the base metals were sharply lower, with losses around 1.5% or more for silver, platinum, palladium, copper, nickel and tin.

FORBES: Focus: Metals Slump On Year-End Liquidation, Scaled-Back Fed Expectations After GDP

Examples of these resources include oil, natural gas, precious metals (particularly gold and silver), base metals such as copper and nickel, and other resources such as diamonds, coal, lumber and even water.

FORBES: How Do Financial Advisors Earn Their Fee?