Unlike other jewelers, he uses a dark metal alloy for the settings to highlight the gems' color.

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In the materials group, Reliance Steel, one of the largest U.S. metals service centers, distributes a line of more than 100, 000 metal products, including carbon, alloy, stainless and specialty steel, aluminum, brass as well as copper products.

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Dr Post's system uses magnets made of an alloy of neodymium (a rarish metal), iron and boron.

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The spheres are then dissolved to leave a 3D-metal scaffold onto which a nickel-tin alloy is added to form the anode, and a mineral called manganese oxyhydroxide to form the cathode.

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To wit, the engineers opted for 4130 chrome alloy steel, an aircraft-grade metal.

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In today's metal-based gadgets, you either need to bend a piece of sheet metal, or die-cast with an inferior alloy like aluminum or magnesium.

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He said the copper alloy fragments could be linked to a metal disc found with the original hoard by metal detectorist, Terry Herbert, in July 2009.

BBC: Stoke & Staffordshire