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A study on the fabrication methods of rough diamond according to their shapes (bruting)  

최덕환 (동신대학교 공과대학 보석공학과)
김세환 (동신대학교 공과대학 보석공학과)
최종건 (동신대학교 공과대학 보석공학과)
Abstract
This paper is a study on the method that it is bruting a peace of a rough diamond with keeping the maximum volume of it. When a diamond will be bruting, how to keep the maximum diameter of one is very important because of its own characteristics that include shapes, mineral characteristics, and so on. In the middle of bruting. concentrating on the work is also required because girdle will be break down. We tried to bruting with gaining maximum diameters of rough diamond. As the result. an octahedron is made into the round shape with size $6.75\times 6.75\times 3.83$ mm , a dodecahedron the cushion shape with size $6.86\times 6.86\times 3.95$mm , a fancy the marquise with size $6.92\times 3.78\times 3.46$mm . Their rates of loss are round brilliant 24.5%, cushion barion 15.5 %, and marquise 18.7 %, respectively.
Keywords
Bruting; Octahedron; Dodecahedron; Fancy;
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