Diamonds look that shape? What kinds of cutters have?

Diamond cutters are radiant diamond of second life and diamond cutters there are many, and most of them are mainly circular cut on the market. There are several kinds of diamond cut? Go to the next with the author. Type the standard round diamond cut type standard round diamond cut, polish mathematician Marshall in 1919 first calculated theoretically let diamonds reflected the large radial cutting equations. Round bright type cutters is by 57 or 58 facets according to certain rules of circular cut cut, also known as the ideal type at the top of the plane are called mesa, waist circumference, diameter of the largest parts of above the waist for the crown, below the waist for booth. Joe coughlin, cut cut is also called the United States, other are cut cut in Germany and Europe, etc. 1. Diameter of the diameter of the diamond circular waist level. The maximum called maximum diameter, the minimum is called the minimum diameter, 1/2 ( The largest diameter + minimum diameter) Value referred to as the average diameter. The unit is mm, precisely to 0. 01. 2. All the diamond mesa deep to the vertical distance between the end point. The unit is mm, precisely to 0. 01. 3. The circumference of the waist that diamonds in the largest diameter. Refers to the waist and waist thickness plane and vertical distance between the low back plane. Oval bright type cutters: appearance: oval outline requirements: shoulder symmetric cut features: bright type/bright type origin: bow tie effect exists in the 19th century. The original stone retaining rate can reach 50% ~ 60%, suitable for long octahedral diamond stone. Also because it can keep high quality diamonds, so much for many of the ancient diamond cutting again. Pear-shaped cut: appearance: pear-shaped outline requirements: the two sides is symmetrical, cut Angle without defect: origin of bright type/bright type: the 17th century, also known as teardrop-shaped cutters or drop shape cutters. A bow tie effects. Pear-shaped cut is very popular in the Louis xiv of France, in the history of the famous nearly 20% using this cut diamond, including the world's largest diamond: cullinan 1. The cutters for machining end edge horn is damaged or defective diamond stone. Mosaic needs to pay attention to the Angle of protection. Lam pointed cut: appearance: lam pointed the outline requirements: Angle symmetry, no defect cut: origin of bright type/bright type: the 17th century, French king Louis xiv also translated into horse eye drill or boat shape cutters. This kind of cut diamond is pointed at both ends, like stone, so the name. A bow tie effects. The cut of the original stone retaining rate is low, pointed at both ends its features, the inclusion of here can be well cover, and Angle of the shining degree is extremely high. Mosaic needs to pay attention to the Angle of protection. Square cut: shape: square cut: bright type/bright type or hybrid origin: the middle of the last century, craftsmen invented by Belgium. This kind of cutters are constantly improve, derived a series of modified form. Due to its modified form both the characteristics of ladder type cutters, so can also be classified as hybrid cutters. Square cut with square or rectangular shape, often have 76 facets. But there are 61, 101 facets or below 144. 101 of them carved square bright type cutters for E below. F。 D。 Registered patent cut diamond company, namely, the princess type drill. Square cutters can be diversified, but the universal crown, mesa is bigger, booth is deeper. This cut the original stone retaining rate is higher than other modes of bright type cutters, but shall not apply to the pavilion of shallow drill blank. Sharp corners and pavilion facet of brightness and scintillation reduces the visibility of the inclusions, also a little 'improve' the level of the color of the diamond, and the same weight of square cut diamond compared with circular cut diamond, appearance appear larger by about 15%. Square shape suitable for diamond closely seamless Mosaic arrangement, this is other shape diamond cannot do, but need to protect Angle when Mosaic. Heart cut: appearance: heart-shaped cutters: origin of bright type/bright type: modern diamond shape with symmetrical two petals, is at the bottom of the groove and sharp corners, like a heart. Heart-shaped diamond full deep shallow, suitable for irregular shape and overall relatively flat diamond stone, place a groove position of inclusions can be removed, in order to improve diamond studs, but they cut the original stone retention rate is low. Heart-shaped diamond shape evaluation mainly focus on two flanks disc symmetry and shape. Emerald cut, shape: rectangular cut: ladder type origins: ancient typical ladder type cut way of derivative processing, all aspects are parallel or perpendicular to the square outside the waist of the diamond, rectangular shape, kiosks and crown is flat, pointed the harvest line. Because the used in the processing of gem emerald. Use emerald cut diamond, more difficult to conceal inclusions, suitable for high clarity, rectangle, edge slightly damaged or inclusions diamond original rock, its retention rate could reach 60% ~ 70% of original rock. The outline requirements: pay attention to the cut to the size of the four corners, the line parallel to the surface must be strictly.