There is an antique gold work technique of mixing gold with other metals, to form colored gold or gold alloys, that was used in the late 1800s. For example, gold mixed with "copper" provided a red sheen or with "silver" a green tint and was used for stems and leaves and the matte surface complimented the satin finish of the gems in the jewelry, such as the velvet blue of turquoise and the glow of Natural Pearls.
Some of the best examples of this type of gold work can be seen in the pre-Victorian gentleman's seals which were considered very important items of costume jewelry at the time. Incredible skill and care went into these important accessories.
1. When & where was the bracelet acquired, for example: purchased at a Flea Market or Auction 6 years ago OR picked it up at a Garage Sale from an Italian family 2 years ago etc
2. A PHOTO PLEASE....(you're welcome to upload a photo of the mark in a follow-up submission. Please use 'follow-up tri color bracelet" in the name your question field.
3. Any other information you may have already discovered and any other details that will help.