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。
12He experimented with yet again in numerous other cities and succeeded with Crystal Caramels.他又在其他几个城市再次尝试，并成功制出了水晶焦糖。
天然水晶是不可再生资源，随着开发的深入，天然水晶存量已越来越少，为了可持续发展，东海县政府早就制定了保护本地资源，鼓励开发海外水晶资源的政策，但是，海外资源也越来越少，很多国家都提高了开采和出口天然水晶的门槛，进入东海市场的外国水晶价格连年暴涨，其中观赏水晶比普通水晶涨价更快。
Most solid products found in nature exist in polycrystalline variety as an alternative to as a single crystal. They are literally made up of numerous grains (small crystals) packed jointly to fill all Area. Just about every specific grain has a special orientation than its neighbours. Whilst very long-vary order exists within one particular grain, in the boundary among grains, the ordering alterations course. A standard bit of iron or copper (Cu) is polycrystalline.
Fig. four: Setting up blocks with different designs and area chemistries immediate the development of unique crystal symmetries.
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�?。
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。
11I diligently opened the bundle and located a crystal bell within.我小心地打开包裹，发现里面有一个水晶钟。
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�?。
The definition of the good appears noticeable; a reliable is generally regarded as being really hard and organization. On inspection, nonetheless, the definition becomes much less uncomplicated. A cube of butter, by way of example, is tough soon after remaining saved within a fridge and is particularly Plainly a solid. After remaining on the kitchen area counter for per day, a similar cube gets rather soft, and it's unclear If your butter really should however be considered a strong.
. The 2nd layer is shaded inside the figure. It's got the same plane-triangular construction; the atoms sit within the holes fashioned by the first layer. The main layer has two equal sets of holes, although the atoms of the next layer can occupy just one established. The 3rd layer, labeled C
The sodium chloride crystal lattice is characterized because of the near packing in the constructive sodium ions and unfavorable chloride ions. Each and every sodium ion is surrounded by six chloride ions, and every chloride ion is surrounded by 6 sodium ions, creating a extremely secure and symmetrical framework.
⑦双色水晶：一种紫色和黄色共存一体的水晶，紫色、黄色之间界限较明显，分别占据晶块的一部分。
Binary crystals are present in many constructions. Some pairs of components sort multiple structure. At area temperature, cadmium sulfide may perhaps crystallize possibly inside the zinc blende or wurtzite structure. Alumina also has two more info possible buildings at place temperature, α-alumina (corundum) and β-alumina. Other binary crystals show unique constructions at distinct temperatures. Among the most complex crystals are All those of silicon dioxide (SiO2), that has 7 diverse structures at several temperatures and pressures; the most common of such constructions is quartz.