Calcite crystals are sometimes Employed in optical devices, and in some cases the graphite in pencil guide are sheets of crystals that effectively split apart layer by layer to jot down. Silica can type silicate crystals which can be The idea for quartz, mica, olivine, and a number of other crystals and minerals.
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。
水晶文化历史悠久，古人曾赋予它一串极富美感的雅称：水玉、水精、水碧、石英等。
养殖晶：养殖晶是指，用天然水晶做种子，然后赋予天然水晶生长的高压条件，养殖器中有富含二氧化硅的分子。然后二氧化硅分子围绕天然水晶种生长，这样的水晶成分（分子式）与天然水晶是一摸一样的，唯一有差别的是，这样的水晶磁场作用没有天然水晶强。
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。
, has the identical composition, but There are 2 alternatives for selecting the holes that the atoms will occupy. The 3rd layer could be placed over the atoms of the 1st layer, creating an alternate layer sequence A
30Three days went earlier, and I was amazed to find out it again: all of the openings ended up sewed up by slim and white thread and so they seemed like the ice crystal on Wintertime's branches from the north.
Crystals are practically nothing over an ordered arrangement of molecules or atoms. Crystals can be found in many various shapes and sizes, and each one has distinct features. Whatever they are created of decides how it is going to form.
Lots of crystals behave like butter in that they're tough at small temperatures but comfortable at higher temperatures. They are known as solids in any respect temperatures beneath their melting stage. A achievable definition of the strong is really an item that retains its condition if remaining undisturbed. The pertinent concern is how long the object retains its condition. A extremely viscous fluid retains its condition for one hour although not a year. A stable will have to retain its shape for a longer period than that.
A crystal system refers back to the classification of crystals based upon the geometric arrangement and symmetry in their lattice buildings. There are 7 primary crystal programs:
15The trick to a good thermoelectric substance is often a crystal construction during which electrons can circulation freely.制造一种好的热电材料的关键是，需要一种电子可以自由流动的晶体结构。
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。
水玉：中国最古老的称法叫水玉，意谓似水之玉，又说是 �?千年之冰所�?�?。唐代诗人温庭筠《题李处士幽居》写道：�?水玉簪头白角巾，瑶琴寂历拂轻�?”。水玉一词最早频繁出于《山海经》：�?又东三百里，日堂庭之�?…�?多水�?”；�?丹山出焉，东南流注于洛水，其中多水玉 ”；�?逐水出焉，北流注于渭，其中多水玉 ”。司马相如《上林赋》曰�?�?水玉磊河 �?。水晶得名水玉，古人是看�?�?其莹如水，其坚如�?�?的质地。
Sensible Vocabulary: linked words and phrases and phrases Geology: mineralogy beneficiation crystalline deposit gemologist gemology more info gold dust graphite idiomorphic intercrystalline like gold dust idiom magnesium mineral nugget pyrite quasicrystal seam silicon unmined vermiculite vulcanicity See more final results » You may as well uncover linked words and phrases, phrases, and synonyms during the topics: