Patents Assigned to Simka Diamonds
  • Diamond cut
    Patent number: 7225642
    Abstract: A brilliant gemstone cut, having a crown, a girdle and a pavilion. The crown has a flat table shaped as an equilateral n-sided polygon. The girdle is also multi sided polygon. The corner, lower girdle, bezel and star facets are at significantly angles of inclination, with respect to the table to provide significantly improved brilliance. The upper corner facets are spaced from the girdle. The space between the corner facet vertices and the girdle is left open to be covered by a prong of a jewelry setting.
    Type: Grant
    Filed: September 9, 2003
    Date of Patent: June 5, 2007
    Assignee: Simka Diamonds
    Inventors: Philip Katz, Isaac Friedman