Crystal Fundamentals Explained
Crystal Fundamentals Explained
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轴性、光性：一轴晶正光性。正交偏光下所看到的一轴晶干涉图是独特的，其黑十字臂未达中心，形成中空的图案，俗称牛眼干涉图。中心部分通常为淡绿色或淡粉色。
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。
对水晶进行评价主要依据其颜色、透明度、大小、净度、特殊图案及是否有光学效应等方面。以颜色纯正，浓度较高，内部无瑕为好。种类上紫晶最贵，其次为黄晶、烟晶、无色水晶和芙蓉石。有特殊光学效应的水晶的价格更高。
③次生包裹体：指主体水晶形成后，由于环境的变化使得主晶周围的一些物质沿裂隙进入到其内部而形成的包裹体。形成的原因有出熔作用、裂隙的结晶化、以及放射性元素破坏的作用等。水晶典型的次生包裹体有胶花水晶中的氧化铁充填物等。
这种水晶观赏石特指水晶晶簇，它是众多单晶体集中生长在一起的晶体组合。晶簇以其晶莹剔透、独特造型而享誉水晶赏石界。
Clever Vocabulary: connected words 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 far more outcomes » You may also uncover linked words and phrases, phrases, and synonyms during the topics:
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�?
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24I need to make my this means crystal clear.我想把我的意思解释得清清楚楚。《牛津词典》
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From the Cambridge English Corpus We are saying the chain topology in the higher w location functions as being the proverbial ' scratch-on-theglass ' necessary while in the organic and natural chemistry laboratory to make crystals. Through the Cambridge English Corpus Consistent-force and temperature molecular-dynamics simulations of crystals on the lecithin fragments - glycerylphosphorylcholine and dilauroylglycerol. From your Cambridge English Corpus Together with these, dust particles are already observed in low-temperature plasmas, like All those Employed in plasma processing and plasma crystals. From your Cambridge English Corpus The final A part of the ebook focuses on peculiarities of strongly coupled dusty plasmas, like the formation of dust crystals and more info affiliated appealing forces. From the Cambridge English Corpus Finish characterization of harm threshold in titanium doped sapphire crystals with nanosecond, picosecond, and femtosecond laser pulses. From the Cambridge English Corpus Unbroken crystals are euhedral; rounded, or more irregular, Principal morphologies were not noticed. From your Cambridge English Corpus See all samples of crystal These illustrations are from corpora and from resources on the web. Any thoughts inside the illustrations usually do not symbolize the impression with the Cambridge Dictionary editors or of Cambridge College Press or its licensors.
Crystallography is definitely the examine of crystals, and it deals with every little thing from perfect geometric shapes to seemingly random conglomerations of particles and minerals.
玉石纹理如果能形成美丽的花纹、图案，其价格就高，如玛瑙内红白相间的色带有规律地排列，形成缠丝玛瑙时，碧玉中的不均匀颜色形成一种风景图案时，材料的价值将提高。当水晶内包裹体形成美丽的图案时，如幽灵水晶、风景水晶，或者针状包裹体呈束状排列时，其价值都高于普通的水晶。图案越美观、越有意境越好。
21You all understand how after you take a crystal prism and move a beam of sunlight by it, you get a spectrum, which appears like a steady band of rainbow shades.