Crystal for Dummies

Crystal for Dummies

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Calcite crystals tend to be Employed in optical equipment, and in many cases the graphite in pencil guide are sheets of crystals that effectively break apart layer by layer to jot down. Silica can sort silicate crystals which can be the basis for quartz, mica, olivine, and all kinds of other crystals and minerals.

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。

晶及其石英岩类玉石是中低档宝玉石，虽比不上钻石、红蓝宝石的高贵，但在加工中如果构思巧妙而且加工精细，同样具有很高的价值。如中国传统的玛瑙“虾盘”、“龙盘”、“水漫金山�?水胆玛瑙摆件)都被誉为国家级宝玉石。

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. These 4 buildings comprise most of the binary crystals with equal numbers of cations and anions.

无色水晶与无色长石因折射率和密度十分接近故较难区分。主要方法是放大检查。长石有两组极完全解理，显微镜下可见两组解理相交而成的“娱蛤状”包裹体或细直的纹理，而水晶则无解理发育，仅有时可见断续不规则的裂理。

石英：《广雅》称水晶叫石英，色白如莹者又叫白。为附的异形字。司马相如《子虚赋》就�?�?雌黄�?�?之句。苏林解释：�?�?，白石英�?”。

There exists a identical directive about crystal glass which differentiates between full guide crystal, direct crystal and crystal.

Crystals are frequently seen as a little something of huge natural beauty, plus they are generally utilised with diamonds or other stones to generate items of jewellery. The vast majority of crystals now are guy-manufactured in laboratories.

crystal The freshly crystallized quartz grains are characterised by elongate crystals oriented oblique into the shear band margins, defining a read more standard grain-form foliation. 来自 Cambridge English Corpus We say the chain topology within the large w location acts because the proverbial ' scratch-on-theglass ' essential from the organic chemistry laboratory to help make crystals. 来自 Cambridge English Corpus The age scatter among the individual crystals could mirror incorporation of xenocrysts from earlier magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene kinds neutral to pale brown, subhedral to anhedral crystals, at times that contains inclusions of plagioclase microlaths and opaque phases.

看孔眼：对于缀穿水晶制品（如项链、手链、佛珠），要看孔眼是否平直，孔的粗细是否均匀，有无细小裂纹。孔壁必须清澈透明，无“白痕”。

水晶形成后由于外力作用或某种人为原因使水晶产生大的裂隙或裂纹，这种裂纹有大有小，对水晶的影响也有大小之分。

14For illustration, We've Quartz crystal clocks and watches accurate to in just one particular minute a year.例如，我们使用的每年误差不超过1分钟的石英水晶钟表和手表。

矿物成分：针铁矿、赤铁矿、金红石、磁铁矿、电气石、石榴石、云母、绿泥石等形成了包裹体水晶，如发晶、钛晶、绿幽灵等，发晶中则含有肉眼可见的似头发状的针状矿物的包裹体形成。含锰和铁者称紫水晶；含铁�?；呈金黄色或柠檬�?)称黄水晶；含锰和钛呈玫瑰色者称蔷薇石英，即粉水晶；烟色者称烟水晶；褐色者称茶晶；黑色透明者称为墨晶。