BRILLIANT Russian patent published in 1999 - IPC

FIELD: jewelry, in particular, cutting of diamonds to obtain brilliants. SUBSTANCE: brilliant has corona, rundist and pavilion. Corona has pad, main faces, pad wedges and paired quadrangles. Pavilion has main faces and paired quadrangles. Inclination angle of corona faces is 16.5 deg plus and minus 1 deg and inclination angle of paired quadrangles of corona is 54.74 deg plus and minus 1 deg. Inclination angle of main faces of pavilion is 42.5 deg plus and minus 1 deg and inclination angle of paired quadrangles of pavilion is 47.5 plus and minus 1 deg. Diameter of pad is (40.0 plus and minus 2)%, height of corona is (18.4 plus and minus 2)%, depth of pavilion is (48.1 plus and minus 2)% and height of rundist does not exceed 2.0% of rundist diameter. EFFECT: increased decorative effect. 4 dwg