Agate:
Agate brings luck and is a stone of joie de vivre, helping you look on the bright side. It will protect you from danger and negative situations, stimulating verbal expression and clarifying thought. It also creates physical and psychic equilibrium, and boosts creativity.

Onyx:
Onyx instills a sense of responsibility and hard work, stimulating a thirst for knowledge and need for learning. It prevents you from inconsiderate action, creating a stable environment, shielding you from mistakes. Onyx also helps get rid of toxins from both body and mind.
Topaz:
Topaz develops the mind, especially organisational skills and the ability to retain knowledge. It will help you to fight your worries, and create a happy, gay atmosphere, making you feel confident in the face of the unknown. Topaz is a happy stone.