老婆戴到出黎火唔火，肉眼真係睇得出架，所以車工真係唔慳得，更何況車工係人手造成既，揀晒3個EXCELLENT都唔係貴好多，所以將BUDGET投資呢PART比較化算。
GIA
Cut is the factor that fuels a diamond’s fire, sparkle and brilliance.
The traditional 58 facets in a round brilliant diamond, each precisely cut and defined, are as small as two millimeters in diameter. But without this precision, a diamond wouldn’t be nearly as beautiful. The allure of a particular diamond depends more on cut than anything else.
Though extremely difficult to analyze or quantify, the cut of any diamond has three attributes: brilliance (the total light reflected from a diamond), fire (the dispersion of light into the colors of the spectrum), and scintillation (the flashes of light, or sparkle, when a diamond is moved).
An understanding of diamond cut begins with the shape of a diamond. The standard round brilliant is the shape used in most diamond jewelry. All others are known as fancy shapes. Traditional fancy shapes include the marquise, pear, oval and emerald cuts. Hearts, cushions, triangles and a variety of others are also gaining popularity in diamond jewelry.
As a value factor, though, cut refers to a diamond’s proportions, symmetry and polish. For example, look at a side view of the standard round brilliant. The major components, from top to bottom, are the crown, girdle and pavilion. A round brilliant cut diamond has 57 or 58 facets, the 58th being a tiny flat facet at the bottom of the pavilion that’s known as the culet. The large, flat facet on the top is the table. The proportions of a diamond refer to the relationships between table size, crown angle and pavilion depth. A wide range of proportion combinations are possible, and these ultimately affect the stone’s interaction with light.
In early 2005, GIA unveiled a diamond cut grading system for standard round brilliants in the D-to-Z color range. This system, the product of more than 15 years of intensive research and testing, assigns an overall diamond cut grade ranging from Excellent to Poor.
How does pavilion depth affect a diamond's cut?
The distance from the bottom of the girdle to the culet is the pavilion depth. A pavilion depth that’s too shallow or too deep will allow light to escape through the sides or the bottom of the stone. A well-cut diamond will direct more light through the crown.
BLUE NILE
· 切割是鑽石最重要的特徵。
· 它對鑽石的美觀具有最大的整體影響。
· 它決定了我們通常所說的亮光程度。
Blue Nile 的珠寶鑑定家建議選擇在您的預算內最高切割分級的鑽石。 理由很簡單： 鑽石 4C 之中，沒有其他特徵對鑽石的外觀有更大的影響。 鑽石的切割分級是對鑽石的折射表現（即我們一般視為亮光）的客觀測量， 當鑽石以恰當的比例切割時，最大部份的光線（亮光）從鑽石的頂部反射出去（珠寶鑑定家稱為桌面）。 如果鑽石切割得太淺，光線會從底部溜走；太深則會從側邊流失。
切割分級
切割分級
Blue Nile 精選級理想型切割： 我們提供的最明亮形切割，代表切割品質大約為最佳 1% 的鑽石。 最高分級的拋光和對稱度使其比標準的理想型切割反射出更多的光線。
理想型切割： 代表切割品質大約為最佳 3 % 的鑽石。 近乎將所有進入鑽石的光線反射出來。 一種絕妙罕有的切割。
極佳切割： 代表切割品質大約為最佳 15 % 的鑽石。 近乎反射出與理想型切割同量的光線，但價格較低。
良好切割： 代表切割品質大約為最佳 25 % 的鑽石。 反射出進入鑽石的大部份光線。 比極佳切割鑽石便宜得多。
一般切割： 代表切割品質大約為最佳 35 % 的鑽石。 一般切割的鑽石依然是優質的鑽石，但不如良好切割般明亮。
不良切割： 一般非常深及窄的鑽石或淺及闊的鑽石在側邊及底部流失大部份的光芒。 Blue Nile 並不供應不良切割分級的鑽石。
甚麼切割分級適合我？
要找最佳的切割，可觀看Blue Nile 精選級系列。 Blue Nile 精選級系列為 Blue Nile 專門製作，精選級系列的每顆鑽石以人手挑選，切割達致最精確的標準，保證是全世界市面最優質的切割之一。
切割分級為良好或極佳的鑽石代表著美觀及價值的優秀組合。
現在您已充分了解切割如何影響鑽石的折射表現（或亮光），您可繼而認識鑽石 4C中的第二個 C 成色 (color)。
要學習更多有關切割的知識，包括折射表現﹑閃爍度﹑火光﹑拋光及對稱度 的技術資料，請瀏覽貼士和提示部份。 要觀看鑽石的各個部份，請瀏覽我們的鑽石剖析圖。
周大福
鑽石的獨特光芒，全靠精心計算，切割打磨嚴謹細緻，恰到好處，每一顆都是高度的藝術結晶。 天然鑽石從勘探、挖掘、切割和打磨，都需要尖端科技與精確計算，糅合專業的技巧、豐富的經驗及嚴謹的態度，才能將原石胚變成美麗耀目的鑽石。
六福
鑽石閃耀璀璨的光芒全賴工匠精巧的工藝，依照鑽石的物理特性來切割，使鑽石的火采充分發揮。
鑽石的車工分為五個等級，由優等到劣等。一顆車工細緻，切割比例得宜的鑽石，能將光線折射到桌面，將鑽石的光芒和火采發揮得淋漓盡致，價值自然較高。相反，一顆切割過深或過淺的鑽石，光線會由鑽石的底部漏走，使鑽石失去光芒。彩了。
鑽石的車工分為五個等級，由優等到劣等。一顆車工細緻，切割比例得宜的鑽石，能將光線折射到桌面，將鑽石的光芒和火采發揮得淋漓盡致，價值自然較高。相反，一顆切割過深或過淺的鑽石，光線會由鑽石的底部漏走，使鑽石失去光芒。彩了。
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