Necklaces By Invite Only 1970's Italian 18 Karat Gold Fortuna Goddess Pendant 18 karat gold Fortuna Pendant Necklace w Enamel, Sterling Silver Men's Necklaces GFG Jewelry Fortuna Amarillo 18K Gold Necklace w. Diamonds & Sapphires. The Roman Goddess of Good Fortune moves forward with intuition and ease. Fortuna brings luck and trust in the midst of the unknown. 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 brass. This is perfectly harmless and is due to the copper content. If you prefer to avoid the dark patina to the metal, try to keep your bronze and brass as dry as possible. If tarnish begins to occur, a Jewelry Cleaning Cloth can be used for touch ups. For a bright shine, it is easiest to use a commercial polish like Brasso to restore your piece to its original luster.