Invisible setting for precious stones for jewelry

An article of jewelry comprising:

• (a) a diamond having a table with a top surface, a girdle and a pavilion located below the girdle, said girdle having first and second oppositely disposed flattened portions spaced apart by a first predetermined distance, each flattened portion having a cut-out having a predetermined width and at least two sloped walls that run substantially parallel to said top surface of said table, said sloped walls being orientated so that one is directed in a first direction which is inward and downward into the diamond and the other of which is directed in a second direction opposite to said first direction so that said at least two sloped walls converge and merge to form a groove that extends across the width of said cut-out and runs substantially parallel to said top surface of said table, and
• (b) a mount having a bore with a diameter which is less than said first predetermined distance of said girdle and having an inner wall with a ridge mean with sides oppositely disposed from each other to correspond to said flattened portions and having a prong, said prong being dimensioned to snugly fit into said cut-outs of said flattened portions and to have a tip that engages one of said sloped walls of said cut-outs.