看颜色：即使在同一种类的水晶中，它的不同部位的纹理、色泽也各式各有千秋。属于单色的，要色度均匀；在同一块水晶上有深浅的，则要求其色调纹路美观大方。
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。
A crystal composition concentrates on how the atoms are organized Within the crystal. Even so, crystallographers have an interest in the general condition and sizing of your crystal together with its external traits. To accomplish this, they should find out about the crystal process.
If you would like see how crystals are fashioned, it is possible to do a little undertaking in the extremely personal kitchen area and find out the development of the crystals arise with the have eyes . This may be finished by putting a little degree of table salt into some normal faucet water, wait around 24 hrs, and you will see wonderful cubed formations. This happens because the water is evaporating, which leads to the atoms which make up the salt (the mineral) as well as drinking water to come back closer together.
There's also several components that resemble crystals but are literally polycrystals. Polycrystals sort when microscopic crystals fuse alongside one another to kind a stable. These components tend not to include requested lattices.
Lattices could possibly have 1 lattice place per cell or multiple, yielding a total of fourteen Bravais crystal lattice kinds. Bravais lattices, named for physicist and crystallographer Auguste Bravais, describe the 3-dimensional array made by a set website of discrete details.
Crystals glimpse distinctive from many other rocks and minerals, but �?barring a number of Exclusive cases �?nearly all minerals cover a crystalline framework underneath the surface.
1A crystal chandelier lit the area.一盏水晶吊灯照亮了房间。《柯林斯英汉双解大词典》
Q.4. What's the distinction between atomic composition and crystal composition? Ans. The primary distinction between atomic composition and crystal construction lies in their definitions: atomic construction refers to how atoms are structured in a one molecule or even a cluster of molecules, Whilst crystal structure considerations the precise arrangement of atoms in just a sound substance.
Crystals with noticeable flat faces are identified as euhedral crystals, although Those people missing outlined faces are called anhedral crystals. Crystals consisting of ordered arrays of atoms that are not usually periodic are termed quasicrystals.
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There are actually other minerals and molecules that could sort these crystal lattices. Snowflakes are a classic example of a about symmetric and geometrically patterned composition from ice crystals, and gemstones of all versions are usually crystals.
《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。”
Tetragonal �?Characterized by 3 mutually perpendicular axes, two of which can be equal in duration, whilst the third is for a longer time or shorter and perpendicular to one other two.