TRANSPARENT JEWELRY MODULE Russian patent published in 1995 - IPC

FIELD: jewelry articles. SUBSTANCE: transparent jewelry module has crown and pavilion. A portion of pavilion facets is made flat and extending in parallel with module axis. Pavilion is made in the form of trihedral pyramid. Crown is made flat, with spherical depression in platform. Diffraction lattice defined by twenty lines is positioned on platform circumferentially of it, with lattice center being aligned with pavilion axis. Pavilion facet cutting angle is determined by difference between first critical angle defining angular coordinate of pavilion upper point and angular coordinate of pavilion apex. EFFECT: simplified construction. 3 cl, 11 dwg