例如，我们使用的每年误差不超过1分钟的石英水晶钟表和手表。

For example, we have Quartz crystal clocks and watches accurate to within one minute a year.

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同时一些硬度相同或更高的物质，例如钻石、刚玉、氧化金属、石英水晶都有可能损坏这些材料。

At the same time, some of the same or higher hardness material, such as diamond, corundum, metal oxide, quartz crystals are likely to damage the material.

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这时期也发现用石英和其他适用的石料制成的饰物，例如大小不一的石环和石玦；

Ornaments such as rings, some slotted, were also made from quartz and other suitable stones.

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