Chakra: Crown, Third Eye, Root
Zodiac: Aquarius
Element: Water
Emotionally:
Amethyst Agate may be able to help calm the mind, reduce stress, and promote relaxation.
Physically:
Amethyst Agate can help aid in headache relief, aid in relieving anxiety and support your mental health.
Spiritually:
Amethyst Agate helps protect you from negative energies and psychic attacks. It’s said to create an invisible protective shield, which may be able to prevent unwanted energies from entering your aura.
Amethyst Agate combines the best metaphysical properties of Amethyst and Agate. This stone is very grounding and stabilising, but also inspires spirituality and connection to higher planes of consciousness.
As it’s combined with both amethyst and agate, it will share many of the properties both amethyst and agate already hold.  
Bringing the two together, it can be said to be the perfect grounding and stabilizing stone. It also offers inspiration for you to maybe connect deeper spirituality. Amethyst agate is said to bring you peace and a sense of calmness wherever you may be.