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。
按照透明度指标，水晶越透明，价格越高，好的透明的水晶加工出的成品晶莹剔透、光辉耀眼。透明度高的水晶能提升颜色的艳丽，否则显得呆板无灵性。光学水晶要求全透明、无双晶、无杂质。工艺水晶要求透明、少裂、少瑕疵。熔炼水晶要求透明，可有较多裂纹。三者价值依次降低，熔炼水晶只能作为熔炼水晶玻璃的原料。在工艺水晶中，晶体较大的，可用来做水晶眼镜和雕刻高档工艺品，因而价格较高。
结晶的形状非常细小，需要用显微镜才能看得清楚，外观上看起来是平滑、块状。常见最多的是各式玛瑙
Most good supplies found in mother nature exist in polycrystalline type in lieu of as one crystal. They are literally composed of numerous grains (little crystals) packed together to fill all Area. Just about every personal grain has a special orientation than its neighbours. Though extended-range purchase exists in just 1 grain, for the boundary in between grains, the buying adjustments way. A typical bit of iron or copper (Cu) is polycrystalline.
. These 4 buildings comprise the vast majority of binary crystals with equivalent numbers of cations and anions.
They can at some point create a nice minimal uniform cluster of atoms, That is the whole process of developing crystals. The greater they can come collectively, the greater of the formation might be visible on the naked eye. Researchers can establish what mineral they are looking at by how the crystals type.
⑩、雷射内雕：以计算机辅助激光设备在水晶对象中进行三维图案的成型，艺术效果好，可以任意表达各类图案，图形，达到逼真效果
Ionic Crystals: Electrostatic forces type ionic bonds. A common illustration can be a halite or salt crystal.
13Nearly all computer systems incorporate a quartz-crystal clock to control their operation.几乎所有的计算机都有一个石英晶体时钟来调节它们的运行。
crystal The newly crystallized quartz grains are characterized by elongate crystals oriented oblique for the shear band margins, defining a typical grain-form foliation. 来自 Cambridge English Corpus We say the chain topology during the significant w region functions since the proverbial ' scratch-on-theglass ' desired within the natural chemistry laboratory to generate crystals. 来自 Cambridge English Corpus The age scatter among the person crystals may perhaps mirror incorporation of xenocrysts from before magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene types neutral to pale brown, subhedral to anhedral crystals, once in a while made up of inclusions of plagioclase microlaths and opaque phases.
say cheese something that someone that is getting a photograph of you informs you to state so that your mouth helps make the shape of a smile
国家还并未给天然水晶提供一个等级划分的具体标准，水晶品种繁杂，每一品种都有他不同的评判标准。
《古今小说·李公子救蛇获称心》：“器皿皆是玻璃、水晶、琥珀、玛瑙为之，曲尽巧妙，非人间所有。”
Clever Vocabulary: similar text and phrases Geology: mineralogy beneficiation crystalline deposit gemologist gemology gold dust graphite idiomorphic intercrystalline like gold dust idiom magnesium mineral nugget pyrite quasicrystal seam silicon unmined vermiculite vulcanicity See more effects » You can more info also discover connected phrases, phrases, and synonyms inside the subjects: