对这类水晶晶簇观赏石的欣赏与评价，主要是强调晶体的完整、品种的名贵（如紫水晶、烟晶、发晶等）、造型奇特、含有名贵晶体（如辰砂、辉锑矿等）伴生等。晶簇产于矿床晶洞中，长相完美的并不多见，要完整无损地采集下来，又比较困难，故而采集起来代价较大，精品晶簇价值也就昂贵了。

Bismuth (Bi) seems being a steel, but the amount of electrons available for electrical conduction is comparable to that of semiconductors. In actual fact, bismuth known as a semimetal. Molecular solids are usually crystals fashioned from molecules or polymers. They may be insulating, semiconducting, or metallic, based on the type of molecules in the crystal. New molecules are consistently getting synthesized, and lots of are created into crystals. The amount of various crystals is gigantic.

景观水晶，就是包裹体组成各种造型特异的水晶，有的似山水，有的似人物，有些像文字，有些像动物，植物，器物等等。

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。

Fig. 4: Creating blocks with distinct shapes and area chemistries immediate the formation of distinct crystal symmetries.

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光泽：玻璃光泽。断口处为油脂光泽。光泽，指宝石表面对光线反射的一种光学性质。观察水晶的光泽，可用手握着它，以灯光或窗户投进来的光线看表面反射，透明水晶亮度与光泽强弱有关。

Crystals are absolutely nothing in excess of an purchased arrangement of molecules or atoms. Crystals are available in many alternative styles and sizes, and each has distinct characteristics. What they are get more info made of determines how it can sort.

本词条由中国科学院大学地球与行星科学学院、中国科学院地质与地球物理研究所 参与编辑并审核，经科普中国·科学百科认�?。

crystal The recently crystallized quartz grains are characterised by elongate crystals oriented oblique for the shear band margins, defining an average grain-condition foliation. 来自 Cambridge English Corpus We are saying the chain topology inside the higher w location acts because the proverbial ' scratch-on-theglass ' wanted during the organic and natural chemistry laboratory to help make crystals. 来自 Cambridge English Corpus The age scatter amongst the person crystals might replicate incorporation of xenocrysts from previously magmatic pulses or protoliths. 来自 Cambridge English Corpus The clinopyroxene types neutral to pale brown, subhedral to anhedral crystals, occasionally that contains inclusions of plagioclase microlaths and opaque phases.

say cheese something that somebody that is having a photograph of you tells you to state so that the mouth would make the shape of a smile

国家还并未给天然水晶提供一个等级划分的具体标准，水晶品种繁杂，每一品种都有他不同的评判标准。

在透明的水晶中，隐裂纹呈亮晶晶的片状，有时还会有晕彩效应。这些裂纹是水晶在生长过程中，遇到外力挤压而在内部产生的一些隐形裂纹，隐裂纹在芙蓉石、紫水晶、白水晶球及白水晶柱中都很常见。有的裂纹后来被物质填充，形成愈合的裂纹，也就是原来的裂纹又长住了。这种裂纹对水晶的影响相对要小一些。

Tetragonal �?Characterized by 3 mutually perpendicular axes, two of which happen to be equivalent in size, though the 3rd is for a longer period or shorter and perpendicular to the opposite two.