What Are the Different Masonry Jobs?

One of the 4C standards for diamonds is cut. Cuts are for bright cut diamonds. ^[1] Bright diamonds are considered the highest value for all other factors.

Diamond cut

For bright cutting, the standard cutting method is 57-hedron cutting.

Please refer to the 4C of the diamond for the titles of the following parts ^[2]

First appeared in

Although it is said that round diamonds are the most common cutting method on the market, sometimes it may feel a bit monotonous, but after all, round diamonds are the most brilliant shape of all cuts, so it is best to have round diamonds! So do you know how many faces a standard round diamond has, and which ones, and what kind of cut is the best?

Standard Round Brilliant

The most common forms on the market include: 1 table top, 8 kite facet, 8 star facet, 16 waist upper facet, 16 waist lower facet, 8 bottom main facet, and a sharp bottom with or without , A total of 57 or 58 facets. The following figure clearly shows the specific positions of the above faces of the diamond: Well, we know this picture clearly when we see this picture. Some people always say why there are 57 faces and 58 faces? In fact, it is very simple. It is the sharpest point of the diamond-Culet bottom point. Generally speaking, diamonds smaller than 5 carats have no bottom point, so the position of the Culet bottom point on the certificate is None or Very small, etc. That is, the bottom tip is not or small enough to be ignored, which is 57 faces. In order to protect diamonds from damage, large Culet tips are generally flattened, so there is one more face, which is 58 faces. Many people often think that the more faces a diamond has, the better it is. This is not the case. There are many diamond shapes, especially shaped diamonds, which can extend a lot of faces. Not all the shapes are better. As a round diamond, the standard bright cut (57-58 faces) is also classical

This humble old industrial neighbourhood of Amsterdam has a 400-year-old super diamond cutting center with annual sales of more than $ 20 billion. The car stopped in NieuweUilenburger, an uncharacteristic, old and new Amsterdam neighbourhood. "Here," said the driver briefly. He added another sentence when I got out of the car: "I hope you bring enough money. When visiting the red light district, he was confused by the marijuana smoke, and did not respond to this kind of cold humor. He went to a low-key but guarded. The strict doorway. The staff on the other side of the glass door nodded at me, got up and pressed a sequence of passwords on a small control panel, and the outside glass door opened. I stepped forward and encountered another The second glass door, when the outside door closed again, the staff member pressed a number or letter on the control panel again, and the second door opened. I went into the real room and relaxed subconsciously. Tone. "Welcome to Gassan Diamonds, and later we will have someone to accompany you to visit our Diamond Plus Workshop. "Another employee walked over from the dark aisle and said. Five minutes later, I finally reached a certain level inside the diamond center (the stack of stairs and the marijuana smoke I had previously inhaled made me dizzy) and glanced In the past, it was a small room separated by frosted glass. The staff who accompanied me took me into one of them. A lady of considerable tonnage in black had sat in the room, like a 3-carat diamond. Majesty. "I will briefly explain to you the classification and grade of diamonds. "Large tonnage ladies first took me through the 4C standards of diamonds, namely carat, color, cut and clarity. Any combination of these four standards will greatly affect the value of a diamond." For example, Wessel The price of white diamond (Wesselton) will be several levels higher than Cape Town s Cape yellow diamond (Cape), but if its clarity is only the worst level of PIQUE 3, the price will drop significantly, a high quality Top Wesselton, 1 carat diamond with perfect clarity, the price will be the same size and clarity as the crystal grade of crystal, because there is a probability problem in this-you can There are not many opportunities to find 4C perfect diamonds. "

Diamond old mold

The unquestionable authority over pricing is an important reason why the 400-year-old Gassan diamond has become Amsterdam's host of up to 350,000 tourists per year. Gassan, along with other large diamond processors and dealers, has allowed Amsterdam to divide and be a big player in the diamond trading industry with annual sales of at least $ 20 billion. "On the diamond trade, we can only be matched by Antwerp. We are sister centers of the diamond trade," said Ms. Tonnage. This was thanks to the Jews bringing diamond-cutting technology to Amsterdam in the 16th century when Antwerp was destroyed by the Spaniards. You should have guessed now that the predecessor of Gassan diamonds, BOASBROTHERS, was founded by the Jewish family, and they built this company into the largest diamond cutting center in Europe in the 19th century. Even during the Second World War, due to the wealth of diamond cutting and the subsequent wealth brought by the exchange, the Nazis tolerated Jewish control of the industry for most of the time, and Gassan is still in the hands of the grandson of the founder's family.

Until now, cutting technology has kept Amsterdam invincible in the global diamond industry chain. Entering Gassan's diamond processing workshop, it is not difficult to see that the diamond cutting technology used since ancient times still affects today. There are no high-tech machines with buttons everywhere, no computer display, and some are magnifying glasses and look very heavy. With. You might even think that the lighting is a bit inadequate here, but those cutting technicians who use a magnifying glass to carefully examine their expensive works do not seem to mind. Perhaps what came to mind at this time was Max Bauer's description of the city in 1896: a huge industry employing only 12,000 people (just cutting technicians), cutting India s global diamonds hard The throne of the city has been seized, and the city has as many as 70 advanced diamond cutting centers using steam as the power of abrasive tools.

Master pricing power with cutting standards

What's the point of maintaining the commanding heights of cutting technology today? Remember when in 2009 the two largest cutting diamond trading companies, EDT and De Beers, successively launched two blue diamond certification standards, "Blue Flame" and "Forever Mark", which applied new cutting technologies? "The upgrade of cutting technology has the most significant meaning for diamonds, such as non-technical products, as price changes," an insider from a diamond brand under EDT told me. Of course, this price change has to go up. However, EDT and De Beers are unwilling to comment on whether there is any cost support for this price increase. "When you sell all the old standard diamonds, or you no longer sell the old standard diamonds, then the market can only accept the price of the new generation of diamonds, and the new cutting standard is the perfect reason for De Beers." People said. This may explain why Amsterdam, which had no advantage in the diamond industry chain, can stand in Europe and the world. Britain and Australia, South Africa, and Canada share the diamond ore under the banner of the Commonwealth, while the Russians With the highest potential production of diamond mines, Indians and Chinese are increasingly becoming the largest diamond buyers, and Jews, they don't even need Israel as their home base because of Amsterdam.

If you are curious, the diamond cutting industry in Amsterdam now employs 8,500 people, scattered in 80 plus workshops, but they are all members of the Diamond Cutting Technician Union, which is maintained by strict regulations. One of the 4C standards is still firmly in the hands of the Dutch, and this C is one of only two objective standards in the 4C standard. "So, do you want to buy a diamond ring? Gassan-processed diamonds have 121 facets and are a sought-after item in the market." The lady of large tonnage pulled me back from my wandering. I looked at the diamond ring with a price of 25,000 Euros I didn't know when I picked it up, and for a while, fortunately, I responded and refused in time. The large-tonnage lady shrugged, and apparently long ago saw that I was a waiter.