If it is immanent, the surface is slightly flawed.
VVS 1。 VVS2 contains tiny inclusions (tiny defects invisible to naked eyes).
VS 1。 VS2。 Contains tiny inclusions (tiny defects invisible to the naked eye).
Si1.si2. Small inclusions (invisible to naked eyes)
I1.i2.i3. Inclusions (visible defects)
The color grading of diamonds is divided into 23 grades from English letters D to Z.
D, e and f belong to the colorless range;
G, H, I and J belong to the near colorless range;
K, l and m are yellowish;
N The prices below are light yellow: (The reference diamonds are Belgian lathe diamonds, and the prices of Indian and Israeli workers are lower)
Weight and transparency /h color and transparency /g color
0.20 carat 2200 2300
0.25 carats 3 125 3250
0.30 carat 4650 4800
0.35 carat 5600 5775
0.40 carat 7000 7200
0.45 carat 8 100 8325
0.50 carat1185012100
There are four kinds of international certificates: 1. GIA (American Jewelry Association) 2. HRD (Belgian Diamond High Council). IGI (Belgian Jewellery Institute) 4. EGL (European Gemological Laboratory).
Each appraisal institute has its own set of appraisal standards, but they are basically the same (a good implementation of Comrade Xiaoping's policy of "seeking common ground while reserving differences"). The seemingly boring numbers on the appraisal certificate are actually closely related to your pocket. For example, a diamond with 1 carat color, clarity and cut is 70% to 80% different from a diamond with 1 carat color, clarity and cut. If converted according to the current domestic market price, the price difference can reach tens of thousands of yuan.
Most domestic consumers don't pay attention to the information of color scale. In fact, this indicator is very important. Diamonds with the same quality and different color grades have a price difference of 20% to 30%; The price difference of different cuts is 30% to 40%. According to the regulations of the diamond appraisal system of H.R.D and the latest diamond value table in 2003, taking diamonds of 65,438+0 to 65,438+0.49 carats as an example, the price difference caused by one color difference exceeds 65,438+00%, which is about $2,000.