Abstract: A double spiral jewelry rope chain is formed with thin-walled links which, due to reinforcement, require the use of less amounts of precious metal as compared to conventional chains. In order to reinforce the chain formed by the thin-walled links, a wire of gold or other precious metal is intertwined between the strands of the jewelry chain and permanently affixed to the chain by a fused connection or bond produced by, for example, soldering, welding, brazing and/or by mechanical crimping.

Abstract: A jewelry rope chain formed of a plurality of interconnected links. Each of the links has an exterior surface and the plurality of the links form the periphery of the chain. The exterior surface of the adjacent links of a pair of opposing groups of such links comprise a diamond cut curved surface. This forms opposing arcuate surfaces on the periphery of the chain. The exterior of the remaining opposing links intermediate of these two groups are uncut. As a result, the periphery of the chain is generally a slight oval in cross sectional configuration.

Abstract: A double helix jewelry chain is constructed from a series of interconnected chain links. Each link is formed with an open mouth defined between a pair of end faces. The end faces are aligned with one another in various predetermined geometrical and dimensional relationships in order to maintain a minimum projected gap or clearance opening equal to or less than the major dimension of an elongated cross section of each link.