Natural Stone: Red Agate Red Agate Only: 12.8mm Size: Inner Diameter 16cm Red Agate is believed to strengthen decisiveness and resolve, empowering you to achieve your goals. Red Agate is said to enhance the passion of love and improve mental and physical health, as well as love luck and a happy family life. It is a stone of love that allows you to accept the feelings of your loved ones correctly and cultivate the courage to move forward.