How Crystal can Save You Time, Stress, and Money.
How Crystal can Save You Time, Stress, and Money.
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Calcite crystals are sometimes Employed in optical devices, and perhaps the graphite in pencil lead are sheets of crystals that primarily crack aside layer by layer to jot down. Silica can kind silicate crystals which happen to be the basis for quartz, mica, olivine, and all kinds of other crystals and minerals.
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。
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。
Fig. 7: A template-directed approach can Handle the placement of setting up blocks on a area while in the development of intricate structures.
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。
Sensible Vocabulary: connected phrases and phrases Glass blower blowpipe bulletproof glass Slash glass fibreglass frosted glassware glaze glazed glazier glazing prism prismatic punty Pyrex reglaze unglazed vitreous vitrification vitrify See extra success » You can even locate connected terms, phrases, and synonyms during the subjects:
根据包裹体和主晶宝石之间形成的先后关系可将水晶的包裹体划分以下三种类�?
As being a hot solution cools or maybe a saturated Option evaporates, particles attract close sufficient for chemical bonds to form. Crystals also can variety from deposition straight from the gasoline stage. Liquid crystals possess particles oriented within an organized fashion, like solid crystals, however have the ability to flow.
24I want to make my this means crystal apparent.我想把我的意思解释得清清楚楚。《牛津词典》
A crystal method refers back to the classification of crystals according to the geometric arrangement and symmetry in their lattice constructions. You will find seven principal crystal units:
There are two such attainable periodic preparations. In Every single, the main layer has the atoms packed right into a aircraft-triangular lattice in which each and every atom has 6 immediate neighbours. Determine 2 exhibits this arrangement for that atoms labeled A
Crystals are not merely renowned for their physical physical appearance, but distinctive crystals of different products and formations may result in an unlimited a number of uses and physical Houses.
crystal, any strong material through which the element atoms are arranged in a very definite sample and whose surface area regularity reflects its interior symmetry.
crystal Alteration is variable: more info absent in many crystals, in Other individuals making dense sericite aggregates which may clearly show some recrystallization effects to produce coarser-grained white mica. In the Cambridge English Corpus The tridymite crystals are rectangular or wedge-formed and are occasionally arranged in aggregates. Within the Cambridge English Corpus On top of that, haloarchaeal cells have been embedded inside salt crystals under laboratory conditions and subsequently analysed by light-weight microscopy. Within the Cambridge English Corpus The white clouds (normally sparse) were also widely viewed as becoming made up of tiny crystals of drinking water ice, alternatively like cirrus inside our environment. Through the Cambridge English Corpus These are located in evaporite salt lakes and might be trapped in salt crystals through evaporation. Through the Cambridge English Corpus Therefore, the cells (organelles and membranes) are wrecked mechanically by ice crystals, leading to Demise as a result of cell lysis. In the Cambridge English Corpus The crystals have been Employed in the first or second orders of reflection. From your Cambridge English Corpus Inside our 8xperiments, the crystals ended up cubes having a base area of 8 e mm. With the Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : outcome of temperature and tension.