Source: Mexico, Italy, United States, Russia, Brazil, South Africa
Colour: Black, grey, white, blue, brown, yellow, red
Onyx is an excellent stone for initiating the modes of centring and alignment of the total person with the higher power. It can be used to banish grief, to enhance self-control, to stimulate the power of wise decision-making, and to encourage happiness and good fortune. It helps one to absorb, from universe, those energies which are needed. This stone promotes vigour, steadfastness, and stamina. Onyx is a mental tonic that alleviates overwhelming fears and worries.
In this specific case I have used Black Onyx.
Source: United States, India, Morocco, Czech Republic, Africa, Brazil
Colour: Clear or milky white, grey, blue, green, pink, brown, black (often artificially coloured)
Agates are grounding stones, bringing about an emotional, physical and intellectual balance. Agate works slowly but brings great strength, by centring and stabilizing physical energy. Agate is known as a healer of inner anger, fostering love and the courage to start again. Agate creates a sense of safety and security by dissolving internal tension.
In addition Black Agate is a stone for peace and healing, it alleviates distractions and provides deep concentration.