AN EXCEPTIONAL FANCY VIVID PINK DIAMOND AND DIAMOND RING 4.49卡拉 心形 艷彩粉紅色 內部無瑕(IF) 鑽石 配 鑽石 戒指

Pink is a delicate colour by nature; sweet, romantic and affectionate. Universally associated with love for oneself and others, reminiscent of friendship and harmony. Often considered a soft and comforting colour, but as the saturation grows stronger, the more passion and energy it exhibits. A versatile colour, full of positivity and charm.

The diversity of pink hues create an element of individuality within each pink diamond. Pink diamonds often have a secondary colour such as orange, purple or brown which modifies its predominantly pink colour. Whilst these modifying colours are just as attractive and valuable, pink diamonds with no modifying colours are most rare. Colours appear different in a given hue range depending on their tone and saturation, only at a few specific saturations and tones are they classified as pink within the hue range of reddish purple to orange. Lot 1807 embraces the most idyllic hue, tone and saturation, receiving the highest colour grading from GIA for pink diamonds, fancy vivid pink, one of the most coveted of coloured diamonds.

Over centuries, pink diamonds have been discovered in several localities, including India, Brazil, Tanzania and even Indonesia and South Africa, however, since the late 1980s, the supply mainly came from the Argyle mine in Australia, which occasionally produced red diamonds. The Argyle Diamond Mine has produced over 800 million carats of rough diamonds yet only less than 1% of the total production are pink diamond roughs. Even with the discovery of this relatively stable mine, the production of pink diamonds in the early 2000s represented 10,000 carats of the 23 to 30 million carats of rough production from the mine. Out of the 10,000 carats, fewer than 10% weighed more than 0.20 carat. Lot 1807 boasts a respectable 4.49 carat weight, which is even more rare when considering its fancy vivid colour grading and internally flawless clarity.

Even among coloured diamonds, pink diamonds are particularly mysterious. Theories dive deep into the crystal structure of the unique stone. Unlike other coloured diamonds, there is no evidence that pink diamonds receive their colour from trace elements such as nitrogen in yellow diamonds and boron in blue diamonds but rather through colour centres within the crystal structure which selectively absorbs light. They are the result of an atomic-level lattice defect, or unusual arrangement of the atoms in a crystal. These defects occasionally cause pink graining in the diamond crystal. A great display of a perfect imperfection. Without these structural abnormalities, the sweet, saturated colour of pink diamonds would not be present. The intensity of the colour depends on the amount of pink graining present. The colour is generally concentrated within parallel narrow bands called glide planes which diamond cutters intricately orient perpendicular to the table in order to maximize body colour.

Pink diamonds tend to be included, according to a GIA study, only 7% of 691 diamonds examined were in the Flawless or Internally Flawless grades. A large percentage of pink diamonds receive slightly included (SI) or included (I) clarity gradings but are still prized for their stunning and attractive colour. Lot 1807 is one of the rare internally flawless pink diamonds in the world, further enhancing its rarity. Pink diamonds may exhibit fractures or cleavages as well as mineral inclusions, sometimes even dark, opaque graphite spots, or other crystal inclusions and are also prone to both internal and surface graining, which can appear as either linear patterns or overall haziness to the stone, both may affect the colour and the clarity grading.

The principal importance when valuing a coloured diamond incontrovertibly lies with the colour. Lot 1807 goes above and beyond depicting an endearing heart-shape, internally flawless clarity and most importantly, stunning fancy vivid pink colour, accentuating the immaculate nature of this highly collectable coloured diamond.

甜美、浪漫且充滿激情，大自然孕育的粉紅色自帶嬌柔，惹人憐愛。溫柔的粉紅色總是讓人聯想到人與人之間那些美好的感情，愛和友誼，惻隱之心等等。然而當粉色色調越飽和濃烈，粉紅色也常常能給人帶來熱情和能量，是一種非常複雜而有魅力的顏色。

粉色鑽石包含多種不同的色調，因此每顆粉鑽都有其獨特的色彩。粉鑽除了主色呈現粉紅色之外通常也會呈現第二種修飾色，包括橙色、紫色或者棕色。這些伴色當然也能讓鑽石呈現複雜迷人的顏色，但不帶修飾的純色粉鑽卻是最為稀有。顏色的形成在於色彩、色調和鮮豔度，只有在顏色處在紅紫色到橙色之間，且色調和飽和度之間達到完美平衡才能被稱為純粉紅鑽石。此次上拍的1807號拍品就是這樣一顆在各方面達到完美平衡的純粉紅鑽石，為此GIA實驗室給出了彩鑽最高顏色評級：艷彩粉紅色鑽石。

數百年來，人們在世界許多地方發現了粉鑽，包括印度、巴西、坦桑尼亞，甚至還有印尼和南非。然而到了1980年代末期，世界上大部分的粉鑽都來自於澳洲的阿蓋爾礦區，同時偶爾也會發現一些紅色鑽石。至今為止，阿蓋爾礦區已經開采了超過8億克拉鑽石原石，其中只有不到1%為粉鑽原石。2000年初，當地粉鑽的原石開採量為2,300到3,000萬克拉，而成品僅有10,000克拉，而在這些成品中，單顆鑽石重量超過0.2克拉的不到10%。此次上拍的粉鑽重達4.49克拉，再加上最高級別的顏色和淨度，實屬難能可貴。

與其他彩色鑽石因微量元素致色情況有所不同，粉色鑽石的致色原因十分神秘，也是當今寶石學家研究的重要課題之一。目前推測天然粉色鑽石裡存在所謂的『顏色中心』，是原子層面晶體結構不規則後選擇性吸收光波的結果。在鑽石形成的過程中，碳原子被施壓後整層平衡滑動偏移，而原子錯位或晶格變形的情況下，一層層移位的例子就是粉紅色的孿晶紋。這些孿晶紋的多寡直接影響顏色的強度，一般來說紋理越多，粉色就越明顯。切割鑽石也需考慮到這些因素以求展現其最美的顏色。

一般來說，粉紅色鑽石由於內部紋理的影響，淨度通常不會太高。而粉紅鑽形成所需的極端環境及它們穿梭到地殻表面所經歷的旅程也對其淨度有一定影響。據GIA實驗室記錄，691顆送檢的粉紅色鑽石中僅有7%為無暇或者內部無暇的級別。因為美麗稀有的顏色，大部分級別為SI或者I級別的粉色鑽石仍然價值不菲。此次上拍Lot 1807擁有極高的內部無暇淨度，十分罕有。

這顆重達4.49克拉的艷彩粉紅色鑽石，不僅呈現明顯且甜美的粉紅色，淨度級別達到內部無暇，切割也是非常飽滿迷人的心形，既是大自然的饋贈，也是一件無以倫比的收藏珍品。