Not known Factual Statements About Crystal
Not known Factual Statements About Crystal
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看颜色：即使在同一种类的水晶中，它的不同部位的纹理、色泽也各式各有千秋。属于单色的，要色度均匀；在同一块水晶上有深浅的，则要求其色调纹路美观大方。
杂质、裂纹越少越好。质地好的水晶制品，应看不到星点状、云雾状和絮状分布的气液包裹体或组成玉石的颗粒。有裂纹、斑点，则属于次品。
人造水晶分为熔炼水晶与养殖晶：据水晶专家汪毅的阐述，随着水晶的价值提高，喜欢的人增多，水晶也引起了作伪者的兴趣，现阶段中国水晶市场常见的造假方法为：
养殖晶：养殖晶是指，用天然水晶做种子，然后赋予天然水晶生长的高压条件，养殖器中有富含二氧化硅的分子。然后二氧化硅分子围绕天然水晶种生长，这样的水晶成分（分子式）与天然水晶是一摸一样的，唯一有差别的是，这样的水晶磁场作用没有天然水晶强。
《全唐诗》卷七八五载《白雪歌》：“鸟啄冰潭玉镜开，风敲檐溜水晶折。”
第二种是“半包裹体”，在水晶结晶以后，由于受到地球引力的影响而产生的裂隙，晶体外的一些物质通过水晶的裂隙渗透到水晶内部，一部分包裹于水晶之中另一部分露于水晶之外。我们可以看到物质渗进水晶的裂迹，常被称为“通道”，这种包裹体所形成的景象相对地较受自然环境和时间的影响，相应的价值也比较�?。
对任何宝石来说，颜色都是非常重要的，水晶也不例外。如果是水晶晶体是有颜色的，如粉水晶、黄水晶、紫水晶等，其颜色评价的最高标准则是明艳动人，不带有灰色、黑色、褐色等其他色调。如粉水晶，颜色以粉红为佳；紫水晶，要求颜色为鲜紫，纯净不发黑；黄水晶，要求颜色不含绿色、柠檬色调，以金橘色为佳。对于发晶来说，晶体的颜色也是很重要的。相同发丝的金发晶，晶体完全无色（白水晶）和晶体略偏茶色，肉眼的视觉观感也是有差别的，所以前者的价格会高于后者。
11I cautiously opened the package and located a crystal bell within.我小心地打开包裹，发现里面有一个水晶钟。
Many crystals behave like butter in that they are difficult at low temperatures but tender at larger temperatures. They're referred to as solids in the least temperatures under their melting issue. A achievable definition of the reliable can be an object that retains its shape if still left undisturbed. The pertinent issue is how much time the item retains its condition. A extremely viscous fluid retains its condition for one hour although not a 12 months. A solid should continue to keep its form lengthier than that.
Crystals with clear flat faces are identified as euhedral crystals, although People lacking defined faces are called anhedral crystals. Crystals consisting of purchased arrays of atoms that aren't always periodic are known as quasicrystals.
Through the Cambridge English Corpus We say the chain topology inside the significant w location acts as being the proverbial ' scratch-on-theglass ' wanted while in the natural and organic chemistry laboratory to help make crystals. read more Through the Cambridge English Corpus Regular-strain and temperature molecular-dynamics simulations of crystals in the lecithin fragments - glycerylphosphorylcholine and dilauroylglycerol. In the Cambridge English Corpus In addition to these, dust particles happen to be observed in low-temperature plasmas, like These Employed in plasma processing and plasma crystals. From the Cambridge English Corpus The ultimate A part of the reserve focuses on peculiarities of strongly coupled dusty plasmas, including the formation of dust crystals and affiliated desirable forces. With the Cambridge English Corpus Total characterization of injury threshold in titanium doped sapphire crystals with nanosecond, picosecond, and femtosecond laser pulses. With the Cambridge English Corpus Unbroken crystals are euhedral; rounded, or more irregular, primary morphologies were not noticed. In the Cambridge English Corpus See all samples of crystal These examples are from corpora and from sources on the internet. Any opinions while in the examples never characterize the opinion from the Cambridge Dictionary editors or of Cambridge University Push or its licensors.
You will find other minerals and molecules that may form these crystal lattices. Snowflakes undoubtedly are a traditional illustration of a roughly symmetric and geometrically patterned structure from ice crystals, and gemstones of all versions are typically crystals.
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。
水晶观赏石是天然水晶中最具代表的作品，具有其他宝石都不具备的观赏性。不论是玉石翡翠还是都要经过雕琢后次能体现他的价值，而水晶观赏石只需要将表面进行抛光，即展现出晶体内所包裹的物质，直接欣赏原汁原味的水晶石。