Crystal Fundamentals Explained

Crystal Fundamentals Explained

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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。

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。

一般而言，紫晶和黄晶是水晶中价值较高的品种。两者进一步的分级是据其颜色的深浅，颜色较深的为A级，稍浅的为B级。一般颜色较深的价格高，但要以不深暗为标准。颜色包括两种，一种是水晶本身的颜色，另一种是内部包裹体的颜色。水晶本身的颜色要艳丽、纯正，分布要均匀，不能太深或太浅，如澳州玉、蓝玉髓、紫晶、黄水晶，其价格就高。无色的水晶内含包裹体的颜色艳丽，其价格也高，如钛晶、绿幽灵、红兔毛。紫水晶一般以稍有云状物、颜色深紫、晶体通透的为上品。

Most reliable resources found in character exist in polycrystalline form rather than as one crystal. They are literally made up of millions of grains (small crystals) packed alongside one another to fill all Room. Every individual grain has a special orientation than its neighbours. Whilst extensive-vary order exists within just a single grain, for the boundary concerning grains, the buying improvements path. A standard piece of iron or copper (Cu) is polycrystalline.

There are a number of crystals based upon geometric buildings, crystal expansion, and product. There is often preparations of hexagonal carbon atoms or amethyst that makes hexagonal pyramid constructions.

当二氧化硅结晶完美时就是水晶；结晶不完美的就是石英：二氧化硅胶化脱水后就是玛瑙；二氧化硅含水的胶体凝固后就成为蛋白石；二氧化硅晶粒小于几微米时，就组成玉髓、燧石、次生石英岩。

Crystals glance exceptional from many other rocks and minerals, but �?barring some Distinctive conditions �?nearly all minerals disguise a crystalline structure underneath the surface area.

Crystals is often developed under moderate circumstances from all 92 naturally occurring components other than helium, click here and helium is often crystallized at minimal temperatures through the use of twenty five atmospheres of stress.

13Nearly all desktops comprise a quartz-crystal clock to control their operation.几乎所有的计算机都有一个石英晶体时钟来调节它们的运行。

多色�?无色水晶没有多色性。有色水晶有弱到强的多色�?表现为体色的不同深浅。

One crystals of metals are gentle and malleable, even though polycrystalline metals are more durable and more robust and tend to be more useful industrially. Most polycrystalline resources could be made into significant one crystals just after prolonged warmth cure. In past times blacksmiths would warmth a bit of steel to make it malleable: heat will make a number of grains develop massive by incorporating more compact ones. The smiths would bend the softened metallic into form after which pound it awhile; the pounding would make it polycrystalline once more, increasing its power.

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。

水精：水晶为何称为水精，《广雅》有巧解：�?水之精灵�?”；李时珍则说：�?莹洁晶光，如水之精英 ”。细加考究，此称还蕴含浓厚的宗教意味呢。水精一名，最初见于佛书，后汉支曜翻译的《具光明定意经》说：�?其所行道，色如水�?�?。

Fig. 5: A chance to know outlined crystal behavior is dependent on the symmetry engineering approach.