| 21. | As an extremely durable, malleable, shiny, and rare metal, gold is recycled, century after century, Bernstein tells us.
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| 22. | "When you see something silver, even if it's cheap, you think it's the rare metal instead of silver paint.
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| 23. | The smoky chimneys are virtual factories for the concentration of rare metals and turn out to be surprisingly familiar.
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| 24. | He engineered Texaphyrin's doughnut hole _ shaped to look like a five-point Lone Star _ to contain rare metals.
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| 25. | At the same time, researchers are trying to improve the performance of cemented carbide by adding rare metal carbides.
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| 26. | A hard, rare metal under standard conditions when uncombined, tungsten is found naturally on Earth only in chemical compounds.
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| 27. | Paxton and explorer Ned Barnes had discovered a rare metal, an antigravity metal, in the rocks high on Mount Everest.
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| 28. | A 3 % royalty was levied on the market value of base, precious, and rare metals and nonnuclear mineral fuels.
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| 29. | After all, a film that comes up with a rare metal called Unobtainium can't be dismissed out of hand ."
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| 30. | A hard, rare metal under standard conditions when uncombined, tungsten is found naturally on Earth almost exclusively in chemical compounds.
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