What is the difference between South African diamonds and ordinary diamonds?
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What is the difference between South African diamonds and ordinary diamonds?
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The difference between South African diamonds and ordinary diamonds is: different origin, different characteristics, and different sources.
. Different origin
1, South African Diamond: South Africa's American drill is the "South Africa" in the southernmost tip of the African continent, and its output ranks fifth in the world.
2. General diamonds: More than 30 countries around the world have diamond resources, and diamonds are located all over the world. The top five countries are Australia, Zair, Botswana, Russia, and South Africa.
. Different features
1, South African Diamond: South African American diamonds are characterized by good diamond texture and large degree of blocks.
2, general diamonds: General diamonds are characterized by high hardness, flashes, strong scattered, shiny, and large reflection light.
. Different sources
1, South African diamonds: South African diamonds are the Golden Belle volcanic eruption in South Africa to the ground, most of which are located in a rock pipe called Kimbelie Rock.
2, general diamonds: General diamonds are formed under high pressure and high temperature conditions of the earth, and are hidden in underground lava formed by magma sprayed from various places.
South Africa is famous for its big diamonds and high -quality diamonds. If any shop tells you that the diamonds in his hands are South Africa, this cannot be proved. I want to be no different from the deception, because most diamonds in the world have collected DTC uniformly. , Later, a hierarchical wholesale.
difficulty !!!!
It is generally produced in China, and South Africa is imported
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For the proportion of diamond rough and gem -level diamonds, the best diamonds come from diamonds mined in the Namibia deposit mines. The natural weathering of these diamonds moved to the beach, with a distance of 1,000 miles. The fragile parts in this journey diamond are separated. Diamonds in a specific sedimentation environment are distributed in the rock layer according to different shapes and different shapes. The maximum of 97%of gem -level diamond -level diamonds in this mining area. For cut diamond noodles, it is difficult to distinguish which country and mining areas produced in.
1867, South Africa discovered the accumulation sand mine and a large number of native kinbarie rock tube to make South Africa the most important diamond producer in the world. Its output was at the forefront of the world for a long time, and it created a new era of the diamond industry. In 1905, the world's largest Kimbelie rock tube -Pleomir rock tube was discovered in Azya in South Africa, and the largest diamond (Kulinan diamond) was found here. At present, South Africa has the world's largest and most modern Venitia diamond mines. South African diamond particles are large and excellent quality. 50 % of diamonds are cutable. Although its output is not as good as Australia and other countries, the output value has always ranked among the top in the world. Since the found that potassium magnesium pimpeds contained diamonds in western Australia in 1979, in 1986, Australia's diamond output had settled in the domineering position, but gemstones accounted for only 5 % of its output. Australia diamonds are mainly distributed in Bingara and Copeton of West Australia and New South Wales, especially Argle mining reserves of 550 million carats. Botswana is rich in high -quality diamonds, with 50 % of gems, and its output value ranks first in the world. The diamonds of Botswana come from the Kimbeli Rock mined in the open air. The huge mines include ORAPA rock tube (1967), rock tube (1977) and Jwanng diamond mines (1982). The total output of the three mines exceeded 15 million carats in 1989 Essence Russia's diamonds are mainly distributed in the Yakut areas in central Siberia. The district found more than 100 diamond -containing golden Bibley rock tubes. In 1988, Russia found a new diamond mine near Europe. At present, Russian diamond output is about 12 million carats, half of the gem level. Over the years, Russia has formed an independent diamond mining and processing system. Its diamonds are large, quality, good quality, and uniform, and have strong competitiveness in the market. In previous years, a large number of Kimbeli Rock was found in northern Canada. After a few years, diamond output can account for 10%of the world's output.
Consider (4C) from the following four aspects:
The color (colour)
The colorlessness is the best, the darker the color tone, the worse the quality. In the colorless diamond classification, the top color is D color, and it is arranged to Z in turn. Here we only say that from D to J's color level, D-F is a colorless level, G-J is a near-color level. Without the meaning of collection, the precepts below the K color are also very beautiful. Because the diamonds from K will gradually be yellowish. When choosing a diamond, the color of the I-J level is also in the nearby colorless category, but it can also notice a slight yellow. Colorful diamonds, such as: yellow, green, blue, brown, pink, orange, red, black, purple, etc., belong to the treasure in diamonds, expensive. Red diamonds are the most precious. Different countries and regions adopt different color grading systems. The American Gem Academy is divided into 23 levels, which are represented by English letters D -Z. The 11 levels of D -N are the most commonly used. European color level system CIBJO is represented. The new national standards formulated by my country in 1996 integrated GIA and CIBJO. This standard divides colors into 12 levels. It is represented by D -N and u003CN, and it is also described and used by the percentage method and text. Diamond color level D 100 pole white E 99 F 98 G97 H 96 white i 95 slightly yellow white (brown, gray) j 94 k 93 light yellow (brown, gray) white l 92 m 91 light yellow (brown, gray) n 90 u003CN u003C90 yellow (brown, gray)
Clarity
diamond-golden commemorative coins
The clarity grading is based on the location of the inner material, the size and number of the quantity are divided. From high to low, it can be divided into FL, if, VVS1, VVS2, VS 1, VS2, SI1, SI2, SI3, P1, P3, P3. Observe the degree The more obvious, the worse the quality, and the price should be reduced accordingly. The FL- "Flawless" is flawless. The inside and outside the mirror of the mirror is flawless inside and outside the mirror. There are only slight flower marks VVS1, VVS2- "very very slight" under ten times the magnifying glass, which is very small. There are difficulties to see under the ten -fold magnifying glass. VVS1 has higher clarity than VVS2. Vs1 and vs2- "very slighte", very small. Bad flaws can be seen under the mirror ten times, but it is difficult to identify with the naked eye. VS1 has higher clarity than vs2. Si1 and Si2- "Slight", small flaws, may see the naked eye. I1, i2 and i3- "Imperfect", flawed, can be seen by the naked eye.
Carat weight
In the same case of other three C, the price of diamonds is proportional to the square in weight. The greater the weight, the higher the value. The weight of the diamond is based on carats. 1 carat (CT) = 0.2 grams (g). The average one -carat is divided into one hundred copies, each of which is one point. The target of the mall price is 0.3CT, and 0.4ct is said to 30 points and 40 points. There are also levels of weight, 0.30-0.39ct, 0.40CT-0.49ct, 0.50CT-0.69ct, 0.70-0.89ct, 0.90-0.99ct, 1.00ct-50CT, 1.50-2.00ct (each level is dependent on each level respectively.逗号隔开,不是一个级别的,就算差一分,价格也会相差很多,这就是为什么象0.48~0.49,0.68~0.69,0.88~0.89......会很难买到的原因)
Cut (Cut)
D diamond
A diamond rough, even if it is thrown on the road, no one will pay attention. Cutting work refers to the geometric shape and arrangement of various petals of the finished nude diamond. The cutting is divided into three items of cutting ratio, polishing, and modification. Each item has five levels. From high to low, it is Excellent, Very Good, Good, FAIR, Poor. Generally, what you see is a standard round diamond -type cut. The top -level -cut stones can reach the closest percentage of light reflexes, that is, three E x (Excellent) cutting, but this cutting price is slightly more expensive, because its income rate is relatively low, the rate of income rate is relatively low, the rate of income rate is relatively low, the rate of income rate is relatively low, and its income rate is relatively low. It is not about 5%higher than the price of the three EX cuts, but the stone fire color of the three EX is definitely the most gorgeous. Several common cutting forms of circular emerald-shaped pear-shaped princess square pillow-shaped heart-shaped heart-shaped heart-shaped heart-shaped heart-shaped heart-shaped heart-shaped heart-shaped heart-shaped eight-arrows-Cabbitki diamond prices: Diamond weight, color color (straight column), clarity (clarity) Horizon), the unit price × 100 × RMB exchange rate (6.9) is the African Star I
to get the price of diamonds. For example: calculate the price of 52 points (0.52ct) F VVS1 first found that the unit price of this level of diamond is 54 US dollars, and the price is calculated: 54 × 100 × 6.9 (RMB exchange rate) × 0.52 (diamond carat) = 19375.20 yuan r r r
The standards for measuring a diamond quality mainly have four dimensions, namely caver, clarity, color (color), and cut (cut). standard". This standard was founded by GIA (American Gem Academy) and is currently the most mainstream diamond evaluation standards in the world. Diamonds were identified by international gem scholars and issued third -party independent opinions. Based on 4C standards, the price of diamonds was determined. At present, the most authoritative gem appraisal laboratory of the international gem is IGI, and the simple identification method of GIA diamonds: need to use a 10-20 times large mirror to assist and make several simple observations. Method 1: Observe the waist of the diamond. If it is sandal waist circumference, it is most suitable for this method. Because diamonds are harder than any imitation products, they will not appear thin stripes like imitation products. Exterior. Method 2: Diamonds are harder than imitation, and the face lines of imitation are often more dull than the diamond feeling, and the face line of diamonds must be sharp. Method 3: Based on diamonds, it is harder than imitation, and the face wires of imitation are often wear. Method 4: If the diamond leaves a natural face, there is a chance to find the unique "triangular growth pattern" of diamonds on the natural surface. Method 5: If the diamond collapses, the appearance is usually staircase, and the imitation products will be completely different in arcs or shells.