The formation of coloured diamonds

Nature's Rarest Gift

 

 

Coloured diamonds are made up of billions of carbon atoms, however if small amounts of other elements are incorporated into the crystal lattice, this can change the colour of a diamond.

Also known as fancy diamonds, coloured natural diamonds, are highly sought after and are even rarer than clear, colourless diamonds.

Discover exactly how these ultra-rare gifts from the earth are formed and the extraordinary natural processes that create coloured diamonds.

How are coloured diamonds formed?

Much like colourless diamonds, coloured diamonds were formed between 900 million to 3.2 billion years ago, deep below the earth’s surface, under intense heat and extreme pressure. They too are made up almost entirely of carbon atoms, however low levels of foreign atoms per million carbon atoms or structural defects can change them from colourless to coloured.

Discover below exactly how each different coloured diamond is formed.

Did you know

For every 10,000 colourless diamonds, only one is classed as a fancy colour diamond.

黄色钻石

钻石中明艳的黄色来自晶体结构中的氮原子。这些氮原子的结构决定了它们能够吸收更多光谱蓝端的光线,让钻石显现出美丽的黄色。

钻石颜色的深浅取决于晶体结构中所含的氮原子数量,颜色越深,钻石的价格也越高。

您知道吗?

只有不到万分之一的宝石级别钻石呈自然的艳彩黄色。

蓝色钻石

蓝色源于钻石中包含的化学元素硼。

尽管只需要微量的硼便能形成蓝色钻石,但它们却十分罕见,200,000颗钻石中仅有1颗钻石呈淡蓝色,呈深蓝色的钻石更是少之又少。

绿色钻石

钻石呈现的绿色,形成于钻石上升至地表过程的最后阶段。这种颜色源于自然辐照作用,通常是由α粒子引起的。通过吸收红色和黄色的光线,钻石表面形成绿色色调,不过这种颜色通常只会呈现在钻石毛坯的纤薄表层中,因此由内到外都呈绿色的钻石极为罕见。

您知道吗?

每年只有少量天然绿色钻石能够进入市场。

粉色钻石

尽管绝大多数的钻石颜色都能找到科学的解释,但粉色钻钻石颜色的由来却始终让科学家困惑不解。他们认为粉色钻石的颜色源于塑性变形——这是钻石深埋地底时面对极端自然压力做出的反应。这意味着它们从未进入其他钻石经历的过程,也让粉钻成为所有彩色钻石中最稀有的一种。

棕色钻石

棕色钻石是最常见的彩色钻石颜色。这种颜色的成因通常源于钻石晶体的结构缺陷,或者在晶体结构中混入了微量氮。这表示它们可以用普通钻石色比色刻度进行衡量,另一种可以这样做的只有黄钻。

黑色钻石

黑色钻石其实并非真的一团漆黑。这些钻石中含有大量的暗色内含物,导致光线无法穿透,形成了暗色的外观。黑钻中常见的内含物包括石墨、黄铁矿或赤铁矿。

其它彩钻都为透明体,但黑钻因大量内含物而呈现不透明的暗色,因此也不会散发无色钻石或透明彩钻的璀璨光泽。

您知道吗?

在所有钻石的颜色中,黑钻的色彩更硬朗刚毅。

红色钻石

红色钻石最为罕见,因此也是彩钻中最为昂贵的一种。尽管尚未有定论,但科学家们相信它的形成原理和粉钻相同,都是塑性变形所致。

您知道吗?

天然红钻稀有至极,全世界至今已知的天然红钻不过二、三十颗而已,且绝大多数重量都不足半克拉。

Imperfections creating beauty

Extremely sought-after and expensive, coloured diamonds are ultra-rare gifts of nature. Incredible processes in the diamonds have allowed for the formation of a stunning array of different coloured diamonds, from the light to the intense and the vivid. These atomic imperfections that have created beauty are a miracle of nature and will always be treasured; today, tomorrow and Forever.


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