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Natural Diamonds | Diamond Stone – GIA C Get to know all you need about diamond – the history, facts, quality factors, treatments, imitations and much more here at GIA
Diamond - Gemological Institute of America A diamond‘s basic crystal shape is the octahedron The surface of an octahedron sometimes displays little triangle shapes called “trigons ”
Diamond Description Diamond forms under high temperature and pressure conditions that exist only within a specific depth range (about 100 miles) beneath the earth’s surface Diamond’s crystal structure is isometric, which means the carbon atoms are bonded in essentially the same way in all directions
Diamond History and Lore Diamond’s splendor has been appreciated for centuries, but there was not much scientific knowledge about it before the twentieth century Since then, diamond knowledge has grown steadily, with research by chemists, physicists, geologists, mineralogists, and oceanographers
Diamond Quality Factors The 4Cs describe the individual qualities of a diamond, and the value of an individual diamond is based on these qualities The terms that people use to discuss the 4Cs have become part of an international language that jewelry professionals can use to describe and evaluate individual diamonds
Most Precious Diamonds, - Gemological Institute of America Know what you are getting in the moments that matter most Each GIA-graded diamond comes with a GIA report that details important quality information about the diamond, including the 4Cs
Diamond Origin | GIA 4Cs The origin of a natural diamond Forming the hardest natural mineral on earth Billions of years ago, 100 miles (161 km) or more in the mantle of the earth, pressure, heat and carbon atoms converged, creating the first diamonds
Diamond Fun Facts Diamond crystals are brought closer to the Earth’s surface through volcanic activity Diamonds can be found in shallow alluvial deposits where the crystals settle after being transported away from the kimberlite pipes by geologic activity and rivers
GIA New York Campus Overview | GIA Education GIA’s New York campus, located in the Diamond District, offers cutting-edge facilities and connects students to the world’s largest diamond market and jewelry industry