PROCEDIMIENTO PARA EL TALLAJE DE PIEDRAS PRECIOSAS NATURA- LES O ARTIFICIALES.

摘要

A diamond is cut to have optically cooperating first facets defining substantially the angle of dispersion so that light rays transmitted through the cooperating facets are dispersed. Second optically cooperating facets are also provided which define half the angle of dispersion so that reflected light impinges a facet at the angle of dispersion so that reflected light rays are also dispersed.