An Unbiased View of Crystal
An Unbiased View of Crystal
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Calcite crystals are frequently Utilized in optical machines, as well as the graphite in pencil direct are sheets of crystals that in essence crack aside layer by layer to jot down. Silica can kind silicate crystals that happen to be the basis 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。
结晶的形状非常细小，需要用显微镜才能看得清楚，外观上看起来是平滑、块状。常见最多的是各式玛瑙
Huge crystals of diamond are precious gemstones. The crystal has other appealing Houses; it's the very best sound velocity of any reliable and is the greatest conductor of warmth. Moreover diamond, the other popular form of carbon is graphite, which happens to be a layered materials. Each and every carbon atom has three coplanar close to neighbours, forming an arrangement known as the honeycomb lattice. A few-dimensional graphite crystals are attained by stacking comparable layers.
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。
Not all crystals variety in water, but almost all crystals kind the identical way, atoms occur together and turn into a uniformed cluster. The method will take as very little as a couple of days to possibly a thousand many years. Organic crystals that come from the Earth sort the exact same way.
Crystals glimpse exclusive from all kinds of other rocks and minerals, but �?barring a few Specific conditions �?almost all minerals disguise a crystalline structure beneath the surface area.
1A crystal chandelier lit the area.一盏水晶吊灯照亮了房间。《柯林斯英汉双解大词典》
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say cheese something which somebody who is taking a photograph of you tells you to mention so that your mouth more info can make The form of a smile
Browse cryptosporidiosis cryptosporidium cryptozoologist cryptozoology crystal crystal ball crystal obvious idiom crystal lattice BETA copyright #randomImageQuizHook.filename #randomImageQuizHook.isQuiz Check your vocabulary with our exciting impression quizzes
The sodium chloride crystal lattice is characterized from the near packing of the constructive sodium ions and negative chloride ions. Each and every sodium ion is surrounded by six chloride ions, and every chloride ion is surrounded by 6 sodium ions, making a really steady and symmetrical framework.
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。
水晶的价值根据品质、块体的大小、美感和产量多少的不同相差较大。遇到好的天然水晶要敢于下手，但好的水晶一般大家都想得到，值与不值，就要看经验了。由于天然水晶的开采和制作原因，没有瑕疵的水晶很难得到，纯净的饰品要达到与合成水晶媲美的品质，实在是很难得。另外，由于水晶的特性，在佩戴过程中，也会改变其等级，比如因为某种原因，有可能会逐渐产生较大裂纹。