Quartz is an amplifier and can be programmed.  If you are using it as an amplifier, place it next to another crystal to amp up that crystal’s energy.  You can also program the Quartz for whatever purpose you would like.
 
Keep the energies in your house positive and clear since Quartz often will also amplify those energies.
 
Size:  .5" diameter .25" depth.  1 available