27Local economists have seemed into their crystal balls and found some thing somewhat unpleasant.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》
A basic thought in crystal buildings is the device mobile. It is the smallest unit of volume that permits equivalent cells to generally be organized jointly to occupy all offered Place. The geometrical basis of all crystals is the lattice. A lattice could be seen as an everyday and infinite arrangement of points or atoms, exactly where Every single position or atom has The same bordering setting.
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。
Fig. seven: A template-directed method can Management the placement of setting up blocks on the floor in the formation of advanced structures.
看抛光：抛光的好坏直接影响到水晶制品的身价。抛光分为软抛光与硬抛光。
Intelligent Vocabulary: linked words and phrases Glass blower blowpipe bulletproof glass Reduce glass fibreglass frosted glassware glaze glazed glazier glazing prism prismatic punty Pyrex reglaze unglazed vitreous vitrification vitrify See additional final results read more » You may also locate connected words, phrases, and synonyms while in the matters:
根据包裹体和主晶宝石之间形成的先后关系可将水晶的包裹体划分以下三种类�?
Ionic Crystals: Electrostatic forces sort ionic bonds. A classic example is actually a halite or salt crystal.
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：
The definition of the reliable seems evident; a reliable is usually considered getting tough and firm. Upon inspection, having said that, the definition will become significantly less uncomplicated. A cube of butter, by way of example, is tough right after remaining stored within a fridge which is Plainly a sound. Immediately after remaining to the kitchen counter for daily, precisely the same dice turns into really smooth, and it is unclear When the butter ought to continue to be regarded a good.
被主体水晶所捕获的包裹体。原生包裹体通常为固相，形态较规则。水晶中典型的原成包裹体有金红石、电气石、黄铁矿等，也会见到岩石碎屑或集合体。
水晶的价值还与块体大小有关，同样的颜色和净度级别，块越大越难得。有时候质量级别虽然低一些，但块体够大，也可能价格高于高级别的小晶体
crystal, any reliable substance wherein the ingredient atoms are organized within a definite sample and whose surface regularity reflects its interior symmetry.
Good Vocabulary: relevant terms 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 extra success » You may as well find associated words, phrases, and synonyms in the topics: