Question 2: Why are there so many diamonds in South Africa? "Why are there more diamonds in South Africa?" The main component of diamonds is carbon, which was formed by volcanic eruption more than one billion years ago. But not all erupting volcanoes can form diamonds, because carbon exists in 150 km to 250 km underground. When a volcano erupts, great pressure and temperature as high as 2000 degrees Celsius will eject carbon from the surface, which will crystallize into diamonds at 40,000-60,000 atmospheres. If the volcano erupts 50,000 meters underground, diamonds will not form.
Question 3: Why are South African diamonds better than other diamonds? It's all misguided by businesses. South Africa only produces a large number of high-quality diamonds. Whether a diamond is good or not mainly depends on its 4c, weight, color purity, cutting, and the price is also affected by fluorescence. You should pay attention to the statement that South African diamonds sell you like this, which shows that the salesman doesn't know the basic knowledge, and he is completely misleading consumers.
Question 4: Why are South African diamonds not the best diamonds? In fact, diamonds are not so particular about the place of origin, and even professionals can't directly tell the place of origin just by looking at diamonds.
Question 5: Why is South Africa so poor with so many mineral resources such as gold and diamonds? Have you ever been to South Africa? Go to the rich area of Thornton, go to any casino in Joburg, go to any club in Cape Town and see what Europe can't compare with.
Question 6: What is the most precious diamond in the world? 1. The "Crown of the British Empire" is inlaid with the famous "black prince Gemstone" (the center of the crown headquarters is red), the world's second largest diamond "Africa Star II" (the lower center of the crown) and St. Edward sapphire (the center of the cross at the top of the kingdom). The crown is inlaid with four rubies, 1 1 emerald, 16 sapphires, 227 pearls and more than 2,800 diamonds of various sizes. 2. The king's scepter 166 1 was made when King charles ii of England held the coronation ceremony. 19 10, the world's largest diamond "Star of Africa I" was inlaid on the top of the scepter, which looked like a water drop and weighed 530.2 carats. 3. Century diamond, weighing 273 carats, second only to Cleland No.1 and No.2. 1980 was found in South Africa, and the original stone weighed 599 carats. After a professional cutter spent three years, carefully studying and pondering, this flawless giant diamond finally shines! 4. The largest colored diamond in the world. The original stone is 890 carats and 407.48 carats cut and polished with pear-shaped drill. In the auction of 1988, it was sold at12.5 million USD. 5. The pear-shaped Dresden diamond is the largest known green diamond in the world, weighing 465,438+0 carats. 6. The famous historical diamond "Ke Inor", also known as "Mountain of Light", is the oldest famous diamond in the world, weighing 106 carats. 7. The olivine cat's eye-1991year was sold for six years.
Question 7: Is there a difference between a South African real diamond and a diamond ring? At 10, the value of a diamond mainly depends on its 4C, and the place of origin is irrelevant.
The 4C grade of diamond refers to:
For us.
transparency
Cutting incision
Weight carat
The origin of 4C means that the first letter of the above four English words is "C", so people's classification of diamonds is simply called 4C classification or 4C evaluation. At present, it is a universal standard for diamond classification all over the world.
Many customers may ask which "C" is more important when evaluating diamonds.
In fact, in 4C evaluation, every factor is very important and plays a key role in the final price of diamond products. When other factors are close, the most important thing is the total number of carats of diamonds. The bigger the diamond, the rarer it is. Therefore, weight plays an important role in determining the price of a diamond, which is why customers are often seen to measure the price.
After understanding the above, we will learn from
1, weight carat Start learning:
1 carat is equal to 0.2g, which is commonly expressed by Clutton (ct). Kela in Greek comes from "keration", which means carob tree. This is a plant that spreads widely from East Asia to the Middle East. Because it is said that its fruit weight is almost the same, carob is used as a unit of weight for jewelry and precious metals. Once you have determined the cut, color and clarity of the diamond, it is easy to find the diamond with the corresponding price according to your budget.
The weight of diamonds is very important in diamond classification. The weight of diamonds is measured in carats. The word "carat" comes from the seed of a tree called "small horn tree". Because the weight of this seed is surprisingly consistent, each seed is one carat, so it was used to weigh diamonds in ancient times. The current national standard is 1ct = 0.2g, and one carat is equal to 100 cent. For example, a 25 cent diamond can be recorded as 0.25 carat. Diamonds of the same quality, the greater the weight, the more precious.
The weight or size of a diamond is measured in carats (ct). 1ct = 0.2 g, 1ct= 100 point (pt) (or equivalent to 200mg). The electronic balance with an accuracy of 0.000 1ct can be used to weigh the precise weight of diamonds, and the mechanical balance can be accurate to 0.00 1ct, which is the international common gem quality unit. Finished diamonds are required to be accurate to two decimal places, the third decimal place of carat value is one ninth, and others are ignored.
Summary: More than 25 points have the value of preservation. Money can buy more than 30 points, and money can buy more than 50 points.
2. Cutting and cutting
The various optical effects of diamonds are determined by the shape of diamonds and the angles between various faces. The quality of cutting only directly affects the beauty of diamonds. From the following 4C classification, we can also see that any nonstandard cutting evaluation factors will affect the brightness and aesthetics of diamonds to varying degrees.
If the mesa is too small, the brightness of the diamond will be greatly reduced; Too big a watch will greatly weaken the fire color of diamonds.
If the cutting is not good, the various optical effects of the diamond can not be fully exerted, and the brightness and fire color of the diamond will also be reduced.
H & ampa cutting (Cupid cutting = = eight arrows and eight centers) is a special cutting method, which overlaps the geometric shapes of the star facet and the pavilion main facet, and cuts eight arrows and eight centers from the desktop and the bottom respectively. The eight arrows and eight hearts cut by H & ampA can only be seen by magnifying observation with a cutting mirror. This special cut is usually a very good cut, because the standard cut specifies a data range, not a single data. The cutting of diamond is the optical key to fully highlight its fire color and reflect the deep shining light of diamond; A carefully cut diamond, no matter what shape or grade, can be full of brilliance and flame; Diamonds with proper cutting ratio have higher natural value.
The width and depth of diamonds have a great influence on the fire color of diamonds.
Cut the pavilion too shallow: the light escapes from the bottom, creating a fisheye effect-the diamonds are lighter in color.
Cut the pavilion too deep: light can easily escape from the pavilion, resulting in a black background effect-it looks like diamonds are black.
Ideal cut: represents the standard that only 3% of first-class high-quality diamonds can reach. This cutting makes the diamond reflect almost all the light that enters the diamond. Elegant and excellent cutting.
Very good cut: represents about 15% of the diamond cut. It can make diamonds reflect the light of standard grade cutting, but the price is slightly lower.
Good cutting: represents about 25% of diamond cutting. Let the diamond reflect most of the light entering the diamond ... >; & gt
Question 8: The standard name of South Africa's diamond is: Synthetic cubic zirconia is a kind of synthetic material for imitating diamonds. The synthetic method is very mature, so the quality of South Africa and the Czech Republic is the same. By the way, China has the largest diamond production in the world, so just buy the ones made in China.
Question 9: Is it true that parents bought South African natural diamonds in Taiwan Province Province? According to your description, nine times out of ten you were tricked into buying junk diamonds. Diamonds are real, but the quality of diamonds is very poor. On the surface, it feels cheaper than in China. In fact, your parents must have been fooled by a penny. You need a GIA certificate to buy diamonds. Diamonds can't identify the place of origin. No one knows where the diamonds in their hands came from. South Africa is mainly famous, so it will give you a misunderstanding that South African diamonds are good diamonds. In fact, in this industry, only GIA and IGI, HRD are recognized hands, hoping to solve your problem.