Lapis Lazuli:  Energy: Receptive   Planet: Venus    Element: Water   Chakra: Throat & Third Eye     Astrological: Sagittarius
Lapis is s tone of awareness.  It aids in attunement with intuition.  It helps stimulate creativity and expands awareness.  It is a protective stone, shielding against psychic attacks.  Physically it is known to relieve insomnia, vertigo, and dizziness.

Malachite: Energy: Receptive  Planet: Venus   Element: Earth   Chakra: Heart & Throat    Astrological: Capricorn & Scorpio
A stone of transformation, aiding in spiritual evolution.  Is helpful in clearing and activating all the chakras.  Malachite is balancing and physically is said to enhance the immune system.

Obsidian:   Energy: Projective    Planet: Saturn    Element: Fire    Chakra: Root    Astrological: Sagittarius
An excellent grounding stone and protective stone.  Obsidian provides a shield against negativity and can disperse unloving thoughts from within the self.

Onyx:   Energy: Projective     Planet: Mars & Saturn     Element: Fire     Chakra: Root      Astrological: Leo
A good stone for centering and alignment.  It can be used to banish grief.  Is also helpful for self-control and wise decision-making.