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。
无色水晶以晶莹美丽、洁净透明着称。衡量无色水晶主要看它的纯度，越纯、越透明越好。干净的、无瑕疵的、杂质少的价值就高。无色的水晶如果很脏，就没有利用价值。
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。
Tetragonal: These crystals sort prisms and double pyramids. The composition is sort of a cubic crystal, other than one axis is lengthier than the opposite.
Fig. 4: Constructing blocks with different designs and area chemistries immediate the development of unique crystal symmetries.
They will sooner or later generate a awesome very little uniform cluster of atoms, this is the process of developing crystals. The more they're able to arrive collectively, the greater of a development are going to be seen for the naked eye. Experts can determine what mineral they are taking a look at by how the crystals form.
30Three days went previous, and I used to be astonished to discover it yet again: each of the openings have been sewed up by slim and white thread and so they looked just like the ice crystal on winter's branches in the north.
②固体包裹体：指呈固态相存在包裹体，多因岩浆、热液、变质作用等形成的早期结晶物被水晶捕获而形成。
水晶是有成色等级之分，影响水晶价位的因素很多，不像钻石以4C就可以判定，所以大家要多听多看多比较才能真正辨别出来。一般的标准是水晶石越大越好，越透越好，颜色越娇嫩越好，形状越典型越好。不过最重要还是自己喜欢，而选购时辨识真伪的方法大致有下列几种：
say cheese a thing that someone that is using a photograph of you informs you to state so that the mouth makes The form of the smile
Single crystals of metals are comfortable and malleable, although polycrystalline metals are more durable and more robust and are more valuable industrially. Most polycrystalline elements is often designed into huge solitary crystals immediately after prolonged heat treatment method. Up to now blacksmiths would warmth a bit of metallic to really make it malleable: warmth tends to make several grains mature large by incorporating smaller sized ones. The smiths would bend the softened metallic into form and afterwards pound it awhile; the pounding click here would allow it to be polycrystalline once more, raising its energy.
The sodium chloride crystal lattice is characterized through the near packing in the optimistic sodium ions and negative chloride ions. Every single sodium ion is surrounded by 6 chloride ions, and each chloride ion is surrounded by six sodium ions, creating a really secure and symmetrical framework.
⑤、打孔：是在水晶成品未完成前，根据其所需打孔之尺寸及位置，以钻头加工，如制表件、笔筒、瓶孔等。
Sensible Vocabulary: relevant words and phrases and phrases Geology: mineralogy beneficiation crystalline deposit gemologist gemology gold dust graphite idiomorphic intercrystalline like gold dust idiom magnesium mineral nugget pyrite quasicrystal seam silicon unmined vermiculite vulcanicity See far more effects » You can also find related text, phrases, and synonyms in the subject areas: