Bronze River Snake RingA delicate snake ring in a flowing design. Snakes are an ancient symbol of transformation and wisdom, and were a traditional form of engagement band in Victorian times. A note on Bronze jewelry: The high copper content in bronze can cause it to darken over time. This is primarily due to a reaction to water and humidity. Some people, depending on their personal PH balance, experience a green coloring to the skin when it comes in contact with bronze and