ROOT CHAKRA
The base chakra controls our “grounding” to the earth and is associated with all our survival instincts and self-preservation.  The base chakra relates also to the physical body, individuality, stability and security.
The colours associated with the base chakra are red, representing passion for life, or black, signifying stability or grounding.
RED JASPER is TOP STONE
Red Jasper is gently stimulating and also an extremely protective stone.  It can neutralize radiation and other forms of environmental and electromagnetic pollution.  Red Jasper rectifies unjust situations and grounds energy.  Brings problems to light and provides insights into difficult situations.  An excellent “worry bead”, Red Jasper calms the emotions. 
BOTTOM STONE is Obsidian
Black Obsidian is a very powerful and creative stone.  It increases self-control.  It forces facing up to one’s true self.  Releases imbalances and negative energies.  Black Obsidian is protective and provides support during change.  It repels negativity and disperses unloving thoughts.