Like all agates, moss agate is a protective stone. It is believed to provide strength and perseverance in the face of difficulty. This is why it is one of the stones said to be helpful to those fighting addictions and other destructive tendencies. Moss agate is believed to balance emotions, promote a positive attitude, increase logic, boost creativity, improve concentration, enhance communication skills, bolster self-confidence, and foster tolerance and patience. It is also thought to assist us to discover buried talent. Called the gardener's stone, the ancients used moss agate to insure a plentiful crop. Moss agate is given as a gift for the 14th wedding anniversary. It is associated with the Zodiac signs of Aquarius and Virgo.