These are quite small tumbles and they are just $1 each (you can purchase just one, or more). All hues of Calcite align well with the human system. Blue Calcite’s vibration does not penetrate very deeply into the system, but is more in alignment with the aura and the mental realms. In light of this it is a valuable early detection tool. Directing it to the aura can help you to notice, focus in, and identify pat-terns that have a tendency to become habit-forming. Blue Calcite’s vibration can also assist with rearranging patterns and this may be  helpful in the blue chakra area with fluency disorders.