| 41. | The motor is quartz-locked, providing accurate rotational speed.
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| 42. | They are cemented by quartz, feldspar and some carbonate matrix.
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| 43. | Quartz and iron mineralisation can be detected in outcrops and subsoil.
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| 44. | The cabin is adjacent to the western shore of Quartz Lake.
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| 45. | The most popular grades are those using quartz as an abrasive.
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| 46. | Since quartz is dimensionally stable, the system can be accurate.
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| 47. | Myrmekite is a globular or bulbous symplectite of quartz in plagioclase.
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| 48. | The remaining miners engaged in the more difficult Quartz reef mining.
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| 49. | :Are you sure that it isn't just quartz?
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| 50. | Matrix minerals in the lode are quartz and / or baryte.
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