Alternatively, calibration may be checked using a Polarization Reference Standard, which consists of a plate of quartz mounted in a holder perpendicular to the light path.
或者，校准可以通过使用一个偏振标准品来进行，该标准品由一片装在垂直于右侧通道的架子上的石英构成。
This exclusive key holder offers a mirror and a small photo frame in bronze snakeskin and Smoky Quartz Crystal Mesh.
这款独特的钥匙扣一面小镜子，另一面是青铜小牛皮相框，上面镶有烟石英色水晶。
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