Amethyst

Courage, psychic energy, dreams, healing addictions (especially to alcohol), peace, happiness, love; opens crown chakra
 

"...And Ye Harm None, do as ye will"

Perhaps the central and foremost essential philosophy of the Witch. I would suggest that the words are self explanatory.
Aquamarine
 
Aries
 
Aquarius
 
Atheme
Ceremonial knife used to draw the circle and direct magickal energy. It is never used to cut anything other than symbolically.