diamond ; brilliant ; jewel
The jewellery firm is just a front for their illegal trade in diamonds.
She wears a diamond ring on her left hand.
She wore a diamond clip on her new dress.
The diamond ring on her finger glittered in the light.
She selected a diamond ring from the collection.
The diamond shone with every hue under the sun.
The genuine role of government is to enrich the diamond system.
And only another diamond can make a slight cut in a diamond.
Flinders decided to have her portrait painted.
The cut of a diamond depends on the skill of its craftsman. 钻石切割靠的是工匠的技艺。
Has somebody helped himself to some film stars diamonds 有人偷了某个影星的钻石了吗
They were dazed by window displays dripping with diamonds and furs. 他们被满橱窗陈列的钻石和皮草弄得眼花缭乱。
The diamond towns are gradually being reclaimed by the desert. 这些钻石城镇正逐渐重归沙漠。
My father has just come into a fortune in diamonds. 我父亲刚刚继承一大批钻石。
Nicole loves wearing her diamonds, even with jeans and a white T-shirt. 妮科尔很喜欢戴她的钻石首饰，即使穿的是牛仔裤和白色T恤衫。
Some people like to dress up in minks and diamonds. 有些人喜欢穿貂皮大衣，戴钻石首饰。
She wore several diamond rings. 她戴了好几个钻石戒指。
Desmond did not believe the diamond was real. 德斯蒙德不相信那钻石是真的。
a black diamond run 黑钻石滑道
a ring with a diamond in it 钻石戒指
a crown encrusted with diamonds 镶满钻石的王冠
The crown was set with precious jewelsdiamonds, rubies and emeralds. 王冠上镶嵌着稀世珍宝有钻石、红宝石、绿宝石。
They were caught smuggling diamonds into the country. 他们走私钻石入境时被发现了。
These diamonds have been handed down in his family for generations. 这些钻石在他家已经传了好几代.
Did you see the diamond pin she got for Christmas 你看到她为圣诞节买的钻石饰针了 吗
This firm is just a front for their illegal trade in diamonds. 这家公司不过是他们进行非法钻石交易的一个幌子.
There was a sudden sparkle as her diamond ring caught the light. 当她的钻石戒指遇到光时,有阵突然的闪耀.
Diamonds look best when they are set against black cloth. 钻石用黑纱映衬显得最美.
The jeweler charges lots of money to set diamonds in a bracelet. 珠宝匠要很多钱才肯把钻石镶在手镯上.关于钻石的英文阅读：闪亮钻石 从何而来
Diamonds: theyre shiny, tough, and an icon of marriage proposals.
钻石闪亮 坚硬 是求婚的标志
On a chemical level, a diamond is just a bunch of carbon atoms bonded together in tetrahedrons.
This crystal structure is why diamond is the hardest natural mineral, and beats most man-made ones too!
So, we know that diamonds are special, but where do they come from in the first place
Diamonds are formed in really extreme conditions,
which is why you might find them at the sites of asteroid impacts, and even on meteorites in space.
But we think most natural diamonds were made millions, if not billions of years ago,
但大多数天然钻石 不是在数十亿年前 就是在数百万年
in the splooshy molten rock deep within the Earth.
Over 160 kilometers beneath the Earths surface,
the intense heat and pressure forced carbon atoms into that tetrahedral structure to form diamonds.
高温高压 使碳原子们形成为四面体结构 再进一步形成钻石
Then, deep volcanic eruptions blasted them up to the surface, at around 40 kilometers per hour.
If the diamonds came up much slower than that,
the gradually-decreasing pressure would let the carbon atoms shift back into other stable forms like graphite.
逐渐减小的压力 会将碳原子转化为其他稳定的形式 如石墨
At the surface, everything cooled really quickly to make these igneous rock formations called kimberlites,
with diamonds hiding inside. And, eventually, we humans came along to mine them.
钻石就藏匿其中 然后 人们挖掘出这些矿石
So we know that diamonds are made of squished and superheated carbon atoms,
but were not exactly sure where that carbon came from. Geologists have two main guesses:
For one, there could be some kind of carbon-containing sediment deep within the Earths mantle,
that never saw the light of day.
Or maybe the carbon in diamonds came from organic stuff in subducting tectonic plates,
like stuff on the ocean floors, but not coal.
That whole all diamonds are just coal under pressure thing is mostly just wrong.
See, coal is a form of organic carbon, but it was made mostly out of ancient plants,
in layers of sedimentary rock closer to the Earths surface.
So it formed way later and way higher up than we think most diamonds did.
These days, scientists can also make synthetic diamonds in a lab with a process called chemical vapor deposition.
Basically, they start with a tiny seed of natural diamond to provide a pattern.
Then, they use high pressure and temperature tools to turn carbon atoms,
usually from a carbon-containing gas, into layers of diamond.
These lab-made diamonds are generally flawless, unlike many natural ones.
Plus, they can be cheaper to buy, and have less of an environmental impact than mining natural diamonds.
另外 人造钻石更便宜 与开采天然钻石相比 对环境影响更小
So whether a diamond came from deep within the Earth or a materials science lab,
its still the same mineral, just with a different story.