Facts About Crystal Revealed
Facts About Crystal Revealed
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水晶表面坑洼的地方，有的深，有的浅，这是水晶在成长过程中自然形成的，并非是人为造成的损伤。缺陷位置本来包有其他矿物晶体，由于包裹体和水晶结合部位的结合力不强，当表面抛光时，矿体脱落，留下空位。这种缺陷在绿幽灵、钛晶、金发晶上都比较常见。
无色水晶以晶莹美丽、洁净透明着称。衡量无色水晶主要看它的纯度，越纯、越透明越好。干净的、无瑕疵的、杂质少的价值就高。无色的水晶如果很脏，就没有利用价值。
天然水晶是不可再生资源，随着开发的深入，天然水晶存量已越来越少，为了可持续发展，东海县政府早就制定了保护本地资源，鼓励开发海外水晶资源的政策，但是，海外资源也越来越少，很多国家都提高了开采和出口天然水晶的门槛，进入东海市场的外国水晶价格连年暴涨，其中观赏水晶比普通水晶涨价更快。
Tetragonal: These crystals form prisms and double pyramids. The construction is sort of a cubic crystal, besides a single axis is for a longer time than the other.
条痕颜色：无色。矿物粉末的颜色叫条痕。它可以消除假色，减弱他色，保留自色，是比矿物的颜色更为可靠的鉴定特征之一。
Lattices can have a single lattice level for every cell or more than one, yielding a complete of 14 Bravais crystal lattice varieties. Bravais lattices, named for physicist and crystallographer Auguste Bravais, explain the 3-dimensional array created by a list of discrete points.
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②固体包裹体：指呈固态相存在包裹体，多因岩浆、热液、变质作用等形成的早期结晶物被水晶捕获而形成。
水晶常以晶簇、晶洞形式产出，其中水晶洞一般存在于由火山喷发而形成的巨厚熔岩流层的火成岩与玄武岩中。火山喷发时所含的气体或热水溶蚀等作用导致岩层中出现大量的孔隙，当富含硅质矿物的流体进入较薄的熔岩孔隙中，且温、压条件合适时将结晶沉淀出水晶等矿物。
crystal The recently crystallized quartz grains are characterised by elongate crystals oriented oblique towards the shear band margins, defining a normal grain-form foliation. 来自 Cambridge English Corpus We say the chain topology in the higher w region functions as the proverbial ' scratch-on-theglass ' required inside the natural chemistry laboratory to create crystals. 来自 Cambridge English Corpus The age scatter among the person crystals may possibly mirror incorporation of xenocrysts from before magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene types neutral to pale brown, subhedral to anhedral crystals, occasionally containing inclusions of plagioclase microlaths and opaque phases.
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Crystallography will be the analyze of crystals, and it discounts with all the things from excellent geometric styles to seemingly random conglomerations of particles and minerals.
14For case in point, We've Quartz crystal clocks and watches accurate to within one particular minute a yr.例如，我们使用的每年误差不超过one分钟的石英水晶钟表和手表。
crystal Alteration is variable: absent in many crystals, in Other people producing dense sericite aggregates which can display some recrystallization outcomes to create coarser-grained white mica. Through the Cambridge English Corpus The tridymite crystals are rectangular click here or wedge-shaped and are sometimes organized in aggregates. With the Cambridge English Corpus Also, haloarchaeal cells ended up embedded within just salt crystals underneath laboratory circumstances and subsequently analysed by light-weight microscopy. From your Cambridge English Corpus The white clouds (commonly sparse) were being also extensively thought to be currently being composed of little crystals of water ice, alternatively like cirrus within our atmosphere. Through the Cambridge English Corpus These are located in evaporite salt lakes and may be trapped in salt crystals during evaporation. With the Cambridge English Corpus Consequently, the cells (organelles and membranes) are wrecked mechanically by ice crystals, leading to Loss of life by cell lysis. Within the Cambridge English Corpus The crystals were being used in the main or second orders of reflection. In the Cambridge English Corpus Inside our 8xperiments, the crystals were cubes using a base spot of 8 e mm. With the Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : outcome of temperature and pressure.