Aligned with the planet and the god Mercury, silver is about communication. Silver has been associated with the moon for thousands of years. As such, it is a stabilizer of any crystal or gem. Rather than adding to the energy of a stone, it secures the energy and supports the gem. 

Silver is a healing metal that should not be worn all the time; let your body tell you when it feels right. Silver offers a mirror of your inner spirit, and this should be given very special attention. Silver is a detoxifying agent and communicates with the body to alert you to raised levels of hormones and other chemical imbalances. The metal is good to wear as a necklace, as it is very beneficial to the throat and lungs. Your synapses even fire more efficiently because silver acts as an energy conductor. Consequently, silver is good for people encountering memory reduction, psychological issues, and diseases affecting the brain.

In olden days, women wore silver around their waists to improve fertility. Men can do the same—by wearing a silver belt buckle, perhaps—to treat impotence or other sexual dysfunction. 

Moonstones are wonderful in combination with the sacred moon metal. Amethyst is also great in a silver setting. Jaspers, agates (especially fire agate), and opals are very suitable in silver. Although diamonds are more often set in gold, they are also terrific in silver settings. The same holds true for sapphires. Lapis, jades, emeralds, and pearls set in silver are said to attract love.

Here is a list of stones you should not set in silver: zircon, tourmaline, and amber. I see amber set in silver all the time, and it is unfortunate because amber is a hot stone and works better with any other metal. 

In foreign countries, silver is used in a variety of customary ways. Parents in China, for example, give their children silver-locket necklaces to show love and offer protection and luck. In France, couples wear silver chains upon getting engaged.