Crystal Fundamentals Explained

27Local economists have looked into their crystal balls and noticed some thing alternatively horrible.当地的经济学者们已预测到将会出现棘手的问题。《柯林斯英汉双解大词典》

⒉棉、云雾或渣状包裹体、杂质在透明水晶内部有雾蒙蒙的现象或是感觉里面像有棉絮状、渣状物质一样的包裹体,这些包裹体的存在,影响水晶的整体美观。还有的水晶内局部含有黑斑或其他颜色的斑状物质,与水晶整体不协调,被视为水晶的杂质,有这种杂质的水晶是次品。

一般而言,紫晶和黄晶是水晶中价值较高的品种。两者进一步的分级是据其颜色的深浅,颜色较深的为A级,稍浅的为B级。一般颜色较深的价格高,但要以不深暗为标准。颜色包括两种,一种是水晶本身的颜色,另一种是内部包裹体的颜色。水晶本身的颜色要艳丽、纯正,分布要均匀,不能太深或太浅,如澳州玉、蓝玉髓、紫晶、黄水晶,其价格就高。无色的水晶内含包裹体的颜色艳丽,其价格也高,如钛晶、绿幽灵、红兔毛。紫水晶一般以稍有云状物、颜色深紫、晶体通透的为上品。

Incorporate to phrase record Include to word list C2 [ U ] clear glass of pretty top quality, normally with its area Slash into delicate styles

2She was carrying a strand of crystal beads.她戴着一串水晶珠子。《柯林斯英汉双解大词典》

Encyclopaedia Britannica's editors oversee subject matter places where they may have intensive awareness, whether from decades of practical experience gained by working on that material or through study for an advanced degree. They create new articles and verify and edit information obtained from contributors.

水晶内部有多种矿物包裹体,形成的各种景观可以肉眼观测,这样的水晶就是包裹体水晶观赏石。由于水晶本身就是宝石,因此人们称誉包裹体水晶为“宝石级的观赏石”。包裹体水晶观赏石都具有独特性,具有极高欣赏和收藏价值。

11I meticulously opened the deal and found a crystal bell inside.我小心地打开包裹,发现里面有一个水晶钟。

包裹体常见有固相、固液气三相组合、空洞以及双晶、色带等。水晶中典型的同生包裹体有自形的锐钛矿、气液两相包体等。

Crystals with noticeable flat faces are known as euhedral crystals, even though Those people lacking described faces are known as anhedral crystals. Crystals consisting of purchased arrays of atoms that aren't constantly periodic are referred to as quasicrystals.

⑥、丝印:水晶表面附有不同的色料进行效果处理,颜色层面较厚,着力后方可脱落。

The sodium chloride crystal lattice is characterized via the close packing in the beneficial sodium ions and negative chloride ions. Just about here every sodium ion is surrounded by six chloride ions, and every chloride ion is surrounded by six sodium ions, creating a highly secure and symmetrical structure.

14For example, We've got Quartz crystal clocks and watches correct to inside of one moment a yr.例如,我们使用的每年误差不超过one分钟的石英水晶钟表和手表。

This crystal framework is responsible for the exceptional physical and chemical Attributes of sodium chloride, including its higher melting point, electrical conductivity, and skill to type ionic bonds quickly.

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