BRILLIANT Russian patent published in 1999 - IPC

FIELD: jewelry, in particular, edging of diamonds. SUBSTANCE: brilliant has corona, rundist and pavilion. Corona has pad, main faces, pad wedges and paired quadrangles of corona. Pavilion has main faces and paired quadrangles. Inclination angle of main faces of corona is 16.5 plus and minus 1 deg, and inclination angle of paired quadrangles of corona is 54.74 plus and minus 1 deg. Inclination angle of main faces of pavilion is 42.5 plus and minus 1 deg and inclination angle of paired quadrangles of pavilion is 47.5 plus and minus 1 deg. Pad diameter is (55.0 plus and minus 2)%, height of corona is (11.7 plus and minus 2)%, depth of pavilion is (48.1 plus and minus 2)%, and height of rundist does not exceed 2.0% of diameter of rundist. EFFECT: increased ornamental effect. 4 dwg