Rule 9c. A border should not be located at the point of greatest curvature in the contour of a cylindrical form. The contour curve is of sufficient interest in itself at that point.
Surface Enrichment of Base and Precious Metals For Small Masses
Rule 10a. Designs in precious metals should call for the minimum amount of metal necessary to express the idea of the designer for two reasons: (1) good taste; (2) economy of material.
Rule 10b. Contour and surface enrichment should never appear to compete for attention in the same design.
Rule 10c. Parts of a design differing in function should differ in appearance but be co-ordinated with the entire design.
Rule 10d. Surface enrichment should at some point parallel the contours of both primary mass and point of concentration especially whenever the latter is a stone or enamel.
Rule 10e. In the presence of either stone or enamel as a point of concentration, surface enrichment should be regarded as an unobtrusive setting, or background.
Rule 10f. Stone or enamel used as a point of concentration should form contrast with the metal, either in color, brilliancy, or value, or all three combined.
Rule 10g. The inceptive axis should pass through and coincide with one axis of a stone and at the same time be sympathetically related to the structure.