Not known Details About Crystal
Not known Details About Crystal
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Calcite crystals are frequently Utilized in optical devices, and also the graphite in pencil direct are sheets of crystals that in essence crack aside layer by layer to write down. Silica can kind silicate crystals which happen to be The premise for quartz, mica, olivine, and a number of other crystals and minerals.
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。
景观水晶，就是包裹体组成各种造型特异的水晶，有的似山水，有的似人物，有些像文字，有些像动物，植物，器物等等。
Massive crystals of diamond are important gemstones. The crystal has other exciting Attributes; it has the very best seem velocity of any good and is the best conductor of warmth. Apart from diamond, the opposite typical sort of carbon is graphite, which is a layered materials. Every carbon atom has three coplanar around neighbours, forming an arrangement known as the honeycomb lattice. 3-dimensional graphite crystals are acquired by stacking identical levels.
C2 [ U ] clear glass of pretty high quality, generally with its surface area Lower into fragile designs:
当二氧化硅结晶完美时就是水晶；结晶不完美的就是石英：二氧化硅胶化脱水后就是玛瑙；二氧化硅含水的胶体凝固后就成为蛋白石；二氧化硅晶粒小于几微米时，就组成玉髓、燧石、次生石英岩。
水晶的评价标准和高端宝石有所不同。多数高端宝石把颜色放在评价的第一位，而对水晶来说，颜色和净度（水晶行业称作晶体）是近乎同等重要的因素：
损伤是指水晶由于加工或不小心摔掉、碰撞等原因，人为造成的损坏。它可以是破口，也可以是凹坑等。
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。
crystal The newly crystallized quartz grains are characterised by elongate crystals oriented oblique to your shear band margins, defining a normal grain-form foliation. 来自 Cambridge English Corpus We say the chain topology during the higher w location acts because the proverbial ' scratch-on-theglass ' needed from the natural chemistry laboratory to make crystals. 来自 Cambridge English Corpus The age scatter among the the individual crystals could replicate incorporation of xenocrysts from earlier magmatic pulses or protoliths. 来自 Cambridge click here English Corpus The clinopyroxene varieties neutral to pale brown, subhedral to anhedral crystals, from time to time made up of inclusions of plagioclase microlaths and opaque phases.
Browse cryptosporidiosis cryptosporidium cryptozoologist cryptozoology crystal crystal ball crystal obvious idiom crystal lattice BETA copyright #randomImageQuizHook.filename #randomImageQuizHook.isQuiz Check your vocabulary with our entertaining picture quizzes
The sodium chloride crystal lattice is characterized via the close packing of the positive sodium ions and destructive chloride ions. Every single sodium ion is surrounded by six chloride ions, and every chloride ion is surrounded by six sodium ions, creating a highly secure and symmetrical construction.
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。
水晶观赏石在形态、质地、内部特征等方面往往十分奇异。大自然有无限风光，都可以在包裹体水晶种找到缩影。