Calcite crystals in many cases are Utilized in optical equipment, and in many cases the graphite in pencil direct are sheets of crystals that in essence break apart layer by layer to write down. Silica can form silicate crystals that happen to be The idea for quartz, mica, olivine, and all kinds of other crystals and minerals.

水晶原石观赏石充分体现了天然水晶的本质，经过抛光的水晶原石观赏石，玲珑剔透、晶莹璀璨，独具匠心的设计，恰到好处地显露出水晶的魅力。如果您想单纯的欣赏水晶，水晶原石观赏石是你的不二之选，给人一种返璞归真的感觉。

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。

We've penned about about 300 stones during the mineral kingdom! Read about each stone's one of a kind origin, historical past, and energies under.

You'll find a variety of crystals dependant upon geometric buildings, crystal development, and substance. There can be preparations of hexagonal carbon atoms or amethyst that makes hexagonal pyramid buildings.

These examples are from corpora and from sources online. Any thoughts from the examples never represent the viewpoint on the Cambridge Dictionary editors or of Cambridge University Press or its licensors.

⑦、镀彩：运用类似电镀的手法在水晶表面以不同的色彩，层面较薄，经摩擦可划伤�?；出现划痕，由于镀彩经常位于底部，因此在镀彩底部经常采用其它对象附着，如生肖文镇。

1A crystal chandelier lit the space.一盏水晶吊灯照亮了房间。《柯林斯英汉双解大词典》

Quite a few crystals behave like butter in that they're difficult at lower temperatures but smooth at increased temperatures. They are referred to as solids in the slightest degree temperatures beneath their melting level. A feasible definition of the stable is surely an item that retains its shape if still left undisturbed. The pertinent challenge is just how long the item retains its shape. A extremely viscous fluid retains its form for an hour although not a 12 months. A solid should retain its form for a longer period than that.

Crystals with evident flat faces are referred to as euhedral crystals, though All those lacking more info described faces are named anhedral crystals. Crystals consisting of purchased arrays of atoms that aren't constantly periodic are called quasicrystals.

⑥、丝印：水晶表面附有不同的色料进行效果处理，颜色层面较厚，着力后方可脱落。

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。

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。

crystal Alteration is variable: absent in several crystals, in Many others developing dense sericite aggregates which can demonstrate some recrystallization effects to produce coarser-grained white mica. With the Cambridge English Corpus The tridymite crystals are rectangular or wedge-formed and are sometimes arranged in aggregates. Within the Cambridge English Corpus On top of that, haloarchaeal cells have been embedded inside salt crystals below laboratory disorders and subsequently analysed by mild microscopy. With the Cambridge English Corpus The white clouds (commonly sparse) had been also greatly considered being made up of tiny crystals of drinking water ice, rather like cirrus within our atmosphere. From your Cambridge English Corpus They're present in evaporite salt lakes and will be trapped in salt crystals for the duration of evaporation. From the Cambridge English Corpus For that reason, the cells (organelles and membranes) are wrecked mechanically by ice crystals, bringing about Dying by mobile lysis. Through the Cambridge English Corpus The crystals were Employed in the initial or second orders of reflection. From your Cambridge English Corpus In our 8xperiments, the crystals had been cubes having a base spot of 8 e mm. From your Cambridge English Corpus Vibration-assisted intermolecular hydrogen tunneling in photoreactive doped molecular crystals : influence of temperature and stress.