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*OTHER FACTOR
There are other factors that greatly affect the price of a diamond: other shades.
For example: Milky, Brown, Green, Mix Tinge, etc.
MILKY DIAMOND
Because the cloud-like impurities (Cloud) contained in it block the path of light reflection and refraction, it looks very white at first glance, but it is opaque and has a cloudy and fuzzy feeling, which affects the fire of the diamond. Simply put, it doesn't flash.
Cause:
The most common cause is caused by serious inclusions, mainly Cloud and Twinning Wist. Therefore, basically the vast majority of milk diamonds exist at SI1 or below, and the lower the clarity grade, the greater the risk. For VS1 or above, there is almost no need to worry about milk drills caused by flaws; sometimes, strong fluorescent light (Strong Blue and Very Strong Blue) is also one of the causes of milk drills.
Identify:
1. The most accurate method is to look at the actual diamond. According to the degree, milk drills are generally divided into shallow milk drills (M1), medium milk drills (M2), and deep milk drills (M3); deep milk drills are easy to see at a glance It can be seen that a fuzzy, non-shimmering shallow milk diamond may require a little experience. It is generally recommended to compare and distinguish another transparent diamond next to it under strong white light. The most accurate method is to be introduced by an experienced expert and judge by looking at the real object.
2. From the certificate; the Comment column on the GIA certificate shows that Clarity grade is based on clouds that are shown, which is almost certainly a milk diamond. If the inclusions in the diamond drawing are not commensurate with the clarity, for example, the SI2 grade is very clean, even if there is only Additional Cloud in the Cmoment, special attention should be paid. Instead, the Cloud located in the drawing does not need to worry too much; on the GIA small certificate, the clarity Level VS2 or below, the types of flaws are relatively simple, cloud-based, with a higher chance of being a milk drill.
Milk diamonds are serious diamond traps. Generally, shops may only introduce them based on the GIA certificate, or hide the description of milk diamonds. Therefore, the safest is to find a reputable merchant to buy, and ask clearly. (The left is normal drill, the right is milk drill)
BROWN DIAMOND
Refers to a diamond that has a brown tones of brown, that is, brown or brown as a sub-tone in white, yellow, orange, green, pink and red diamond colors, and can also appear alone as a brown diamond. For white diamonds, a diamond with brown color is a brown diamond.
White diamonds with coffee grades are: Normal (WH), Light Brown (BRN), Light Brown (BRN1), Medium Brown (BRN2), dark Brown (BRN3). Brown-colored diamonds can seriously reduce the purity and brilliance of the diamond's main color.
Brown diamonds are now the blind spot in the identification of diamond certificates. Coffee diamonds do not affect their 4C grading, but they will affect the fire color of diamonds, thereby affecting the price of diamonds. The most effective identification method is to observe the real object or the real picture, because the coffee diamond will obviously see the brown color.
GREEN DIAMOND
The green diamonds mentioned here are not green diamonds in colored diamonds, but green-white diamonds in colorless diamonds. This green appears as a light brownish green in brownish diamonds, and is actually the most common photoluminescence phenomenon in brown diamonds. The reason for the green appearance is the fluorescence emitted by brown diamonds under the excitation of visible light, which is called photoluminescence. This brown-green tinge occurs in a large percentage of coffee-sweetened diamonds. The impact of the green tone is not serious, and it is usually the finished product cut from the rough stone in some mining areas, which is not common.
MIX TINGE
Refers to white diamonds with mixed hues, The grades are:
Color Normal (N), Light Tone (BT), Dark Shade (LB), Light Mixed Color (MT1), Medium Mixed Color (MT2), Green Tone (GT), Pink Tone (PT).
The image below is a physical representation of the F and J color diamonds with Max Tinge.
These factors that affect colorless diamonds are generally not listed on the diamond certificate.
However, it has a great impact on the price of diamonds, and you must ask the seller before buying.
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