Aggie Lala. Diamonds. August 26th , 2017.
As mentioned earlier, depth and width are two important factors of a diamond cut. If depth of a diamond is too much, then it will result in a diamond that gives dark shaded areas when viewed through its table (the flat top region of the diamond).The Gemological Institute of America (GIA) provides the ideal percentage range of the depth, the table, and the percentage ratio of each of them to the width of the diamond. Hence, one should always purchase a diamond that is GIA certified. A good table cut is considered to be one which is 53% to 64% of the width, while a good depth is one which is 58% to 64% of the diamond width. Thus, you should go for a diamond which is certified as good with respect to both depth and table.
Pinpoints: This is a very commonly seen characteristic. This is a very tiny crystal that is embedded inside the diamond. It looks like a pinpoint of light when the diamond is viewed under magnification of 20x and more.
Hue and saturation of color decide its value. When more or less yellow hue is present, it is regarded as less expensive, while pink or blue hue can boost its price. One of its best examples lies in Hope Diamond which is dramatically precious. In general, the ones used in gemology are basically transparent with a little tint. They are also known as white diamonds. Nitrogen is the most common impurity found. Due to its presence in the structural bonding, replacing carbon atoms leads to yellowish, brownish tint.
So far, we have discussed diamonds that can be found on earth. However, carbon, being a highly common element in the universe, diamonds may also be created in extraterrestrial environments. For instance, meteorites may contain diamonds. Meteorites are pieces of metal, rock and other elements that have entered the earth from outer space. When a meteor of considerable size enters the earth's atmosphere, a large amount of heat is generated due to friction. In addition, the impact that is caused when they strike the earth will also create massive amounts of heat and pressure. Once again, when the conditions are just right, the crater that results from the meteor strike may contain small diamonds. In addition, diamonds may already be present on meteors and survive the impact. Of course, meteorite diamonds are even rarer than naturally created mined diamonds.
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