A reliable is crystalline if it has prolonged-vary order. As soon as the positions of the atom and its neighbours are identified at a person place, the area of each and every atom is thought specifically through the entire crystal. Most liquids absence very long-assortment purchase, Despite the fact that a lot of have quick-assortment purchase. Quick range is defined as the main- or 2nd-nearest neighbours of an atom. In lots of liquids the 1st-neighbour atoms are organized in a similar framework as from the corresponding stable section.

按照透明度指标，水晶越透明，价格越高，好的透明的水晶加工出的成品晶莹剔透、光辉耀眼。透明度高的水晶能提升颜色的艳丽，否则显得呆板无灵性。光学水晶要求全透明、无双晶、无杂质。工艺水晶要求透明、少裂、少瑕疵。熔炼水晶要求透明，可有较多裂纹。三者价值依次降低，熔炼水晶只能作为熔炼水晶玻璃的原料。在工艺水晶中，晶体较大的，可用来做水晶眼镜和雕刻高档工艺品，因而价格较高。

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。

Encyclopaedia Britannica's editors oversee matter regions in which they've substantial understanding, regardless of whether from yrs of working experience received by working on that material or via review for a complicated diploma. They write new information and confirm and edit written content received click here from contributors.

《全唐诗》卷七八五载《白雪歌》：“鸟啄冰潭玉镜开，风敲檐溜水晶折。”

⑧、雕刻：立体感强，工艺高，做工精细，成本高。分手工雕刻图形、机器雕刻文字。

水晶内部有多种矿物包裹体，形成的各种景观可以肉眼观测，这样的水晶就是包裹体水晶观赏石。由于水晶本身就是宝石，因此人们称誉包裹体水晶为“宝石级的观赏石”。包裹体水晶观赏石都具有独特性，具有极高欣赏和收藏价值。

Hexagonal �?Characterised by four axes, 3 of that are equal in duration and intersect at 120 levels, by using a fourth axis perpendicular to the other 3.

24I want to make my that means crystal obvious.我想把我的意思解释得清清楚楚。《牛津词典》

[ C/U ] transparent glass of top of the range, commonly with its surface area Slash into styles that reflect light-weight

地质学家目前为止对晶洞形成还没有广泛认同的理论，但相信晶洞可以在任何埋藏的空腔内形成。这些空腔可以是火成岩中的气泡、树根下的空穴，甚至动物挖的地洞。经过漫长时间，空腔的外壁变硬，溶解的矽酸盐或方解石沉积到内壁。再经过漫长的时间，缓慢渗入的矿物使得晶体在空腔内部结晶。

Orthorhombic: These are definitely rhombic prisms and dipyramids that resemble tetragons but without sq. cross-sections.

玉石纹理如果能形成美丽的花纹、图案，其价格就高，如玛瑙内红白相间的色带有规律地排列，形成缠丝玛瑙时，碧玉中的不均匀颜色形成一种风景图案时，材料的价值将提高。当水晶内包裹体形成美丽的图案时，如幽灵水晶、风景水晶，或者针状包裹体呈束状排列时，其价值都高于普通的水晶。图案越美观、越有意境越好。

Tetragonal �?Characterized by three mutually perpendicular axes, two of which are equal in duration, while the 3rd is for a longer time or shorter and perpendicular to the opposite two.