| 摘要 |
To provide a diamond rendering reflective light off the table goldenly brilliant by making a proportion thereof symmetry at any place viewed from an upper face, a side face or a bottom face, first reference lines, second reference lines crossing the first reference lines at right angles and third reference lines equally dividing the first reference lines and the second reference lines into four equal parts, respectively are provided. A first arc line is made by intersections of the reference lines. The approximately regular hexadecagon shaped table is established by connection of the intersections of the reference lines with the first arc line. Fourth reference lines dividing the third reference lines into two equal parts and a second arc line with a circle concentric with and larger than the first arc line is made. Star facets are established by connection of the intersections among the fourth reference lines and the second arc line with the top of the table. Upper main facets are established by connection of intersections of a diamond outward appearance and the first and the third reference lines with intersections of the fourth reference lines and the second arc line.
|
