Agate Gemstone necklace. 18" in length. Agates are aggregates of various forms of silica. They are found in shades of red, yellow, brown, orange, black and white. The Agates in this necklace are white with some black mixed in the stone. Agates are said to strengthen a person's connection to the earth by grounding the emotions. It lessens the feelings of envy, relieve emotional pain and improve stamina. The multicolored Agates gives strength for caring out ones goals.