<P> The different colors of gold used for leaves and other details are made when the pure 24 Karat yellow gold is alloyed with copper to achieve the traditional 14 karat pink (or red) gold, and the gold is combined with silver to create the 14 karat green gold . The resulting gold bars are then readied for rolling . </P> <P> The alloyed gold bars are rolled by presses to different thicknesses for different types of jewelry . Each part is carefully stamped, one at a time, out of the rolled gold sheets using patterns and dies . The solid gold leaves and other patterns are then ready to be added to a cast jewelry base . </P> <P> The cast pieces are then polished by one of two methods, either traditional hand polishing using a wheel, or a process called "tumbling ." For tumbling: many castings at one time are placed in a tub or cylinder with different sizes and shapes of metal, rubber or other materials in a liquid solution, then agitated or rotated until they have been polished smooth . These smooth, cast pieces are then ready for the stamped components, like leaves and grapes, to be mounted on them . </P> <P> Some manufacturers, such as Landstroms, use the traditional method to attach the pieces, where the stamped components are individually hand - soldered to the cast gold frame using torches and karat - gold solder . Other factories place the solder and components together on the cast item, leaving several such assemblies in a soldering oven where they are soldered by the heat of the oven . </P>

What's the difference between gold and black hills gold