Word: crystalize
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Harvard mineralogists said that the crystal is probably about 100,000,000 years old, and that its formation must have required extraordinarily stable conditions for a period of a million years or more...
...giant 225-pound Brazilian topaz crystal, one of the largest and finest in the world, has been obtained by the Mineralogical Museum, and will be placed on permanent public exhibit about February 6, museum officers announced today...
...ordinary topaz crystal weighs but a few ounces and is about one inch or less in diameter. The Harvard topaz is eighteen inches in diameter and described as a "short prismatic" crystal. It is white in color, with inclusions of dark manganese minerals distributed in parallel streaks...
Lifted Voices. Less than crystal clear was the President's proposal, which was supported by ex-President Hoover. It was no secret that Finland needed arms more than food, money more than arms. The vague reference to loans in South America frightened some who might otherwise have approved of aid to the Finns. But if the President's proposal lacked clarity, the Senators' discussion lacked that and a good deal more. What worried Senators was not aid to Finland. It was: should the President's letter be referred to the Committee on Banking and Currency...
More recently he has conducted research in the field of high-frequency oscillation, developing the quartz crystal oscillator used by radio stations to fix transmission frequencies. He has also applied his researches on high frequencies to supersonic sounds of nature, studying the extremely high notes of insects, beyond the range of human hearing...