"When feel people feel insecure about what's happening, the price [of gold] tends to rise," she said. Many people are turning to platinum or tungsten-carbide for rings, she said. "With the high ...

much of which was directed to the manufacture of tungsten carbide tooling. Tungsten has the highest melting point known, 3,422 °C, and is an extremely dense, hard, and tough metal. Its properties ...