Not known Details About Crystal
Not known Details About Crystal
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These crystals had been fashioned more than 1,000,000 several years ago In the Earth's crust. They occur if the liquid within the Earth consolidates as well as the temperature chills. Other crystals type when the liquid can make its way through the clefts and dispense minerals in to the clefts.
③、粗抛光：是将模具压出之毛胚，以金刚石盘直接磨出成品之刻线。④、细抛光：在粗抛光之后，以抛光粉来磨成品至晶莹剔透为止。
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 word list Include to phrase list C2 [ U ] clear glass of pretty premium quality, ordinarily with its area Slice into sensitive designs
《全唐诗》卷七八五载《白雪歌》：“鸟啄冰潭玉镜开，风敲檐溜水晶折。”
Lattices could have a single lattice point per cell or multiple, yielding a total of fourteen Bravais crystal lattice kinds. Bravais lattices, named for physicist and crystallographer Auguste Bravais, explain the three-dimensional array made by a set of discrete points.
30Three times went earlier, and I was surprised to determine it all over again: the many openings have been sewed up by slim and white thread and they appeared much like the ice crystal on Wintertime's branches from the north.
There exists a related directive about crystal glass which differentiates in between complete lead crystal, direct crystal and crystal.
本词条由中国科学院大学地球与行星科学学院、中国科学院地质与地球物理研究所 参与编辑并审核，经科普中国·科学百科认�?。
The definition of a strong appears clear; a solid is usually regarded as becoming difficult and firm. Upon inspection, on the other hand, the definition gets less uncomplicated. A cube of butter, one example is, is difficult following currently being saved in the fridge and is particularly Evidently a strong. Soon after remaining about the kitchen area counter for per day, a similar dice becomes quite gentle, and it truly is unclear When the butter must still be regarded a strong.
天然性是水晶观赏石的基本特性。通常整体造型水晶矿物不饰雕琢就具备很高的观赏价值，但是包裹体水晶观赏石经常需要适当打磨抛光，这样更方便观赏水晶内部的包裹体。
Molecular Crystals: Full molecules are bonded to each other within an organized manner. A fantastic instance is a sugar crystal, which incorporates check here sucrose molecules.
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 the way when you take a crystal prism and move a beam of sunlight by it, you will get a spectrum, which looks like a constant band of rainbow shades.