5 Simple Techniques For Crystal

5 Simple Techniques For Crystal

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轴性、光性：一轴晶正光性。正交偏光下所看到的一轴晶干涉图是独特的，其黑十字臂未达中心，形成中空的图案，俗称牛眼干涉图。中心部分通常为淡绿色或淡粉色。

①压电效�?在机械力(压力或拉�?作用下，水晶单晶体的两端会产生电荷，其电量相等但符号相反。在工业上，无色、无缺陷、不具双晶的水晶常被用来作压电石英片。

天然水晶是不可再生资源，随着开发的深入，天然水晶存量已越来越少，为了可持续发展，东海县政府早就制定了保护本地资源，鼓励开发海外水晶资源的政策，但是，海外资源也越来越少，很多国家都提高了开采和出口天然水晶的门槛，进入东海市场的外国水晶价格连年暴涨，其中观赏水晶比普通水晶涨价更快。

Add to phrase list Increase to word listing C2 [ U ] clear glass of really high quality, usually with its floor Slash into delicate designs

25If you're a Billy Crystal fan, you may really like this film.如果你是比利·克里斯特尔的影迷，你就会喜欢这部电影。《柯林斯英汉双解大词典》

These examples are from corpora and from sources on the web. Any opinions within the illustrations usually do not stand for the opinion from the Cambridge Dictionary editors or of Cambridge College Press or its licensors.

水晶的评价标准和高端宝石有所不同。多数高端宝石把颜色放在评价的第一位，而对水晶来说，颜色和净度（水晶行业称作晶体）是近乎同等重要的因素：

1A crystal chandelier lit the home.一盏水晶吊灯照亮了房间。《柯林斯英汉双解大词典》

水晶是有成色等级之分，影响水晶价位的因素很多，不像钻石以4C就可以判定，所以大家要多听多看多比较才能真正辨别出来。一般的标准是水晶石越大越好，越透越好，颜色越娇嫩越好，形状越典型越好。不过最重要还是自己喜欢，而选购时辨识真伪的方法大致有下列几种：

Crystals with apparent flat faces are termed euhedral crystals, whilst People missing described faces are referred to as anhedral crystals. Crystals consisting of ordered arrays of atoms that aren't constantly periodic are called quasicrystals.

All crystal ball crystal distinct copyright liquid crystal crystal lattice crystal construction liquid crystal Exhibit See all meanings Idioms and phrases crystal very clear idiom

Crystal Lattices You can find seven systems of crystal constructions, which are also called lattices or Area lattices:

⑨、喷砂：立体感弱，较平整，无凹凸感，机器雕刻文字、图形等后进行效果处理。成本低制作快。

21You all know how after you have a crystal prism and go a beam of daylight click here by means of it, you have a spectrum, which seems like a steady band of rainbow colours.