Amethyst is an amazing stone for Taurus Moon people.
Amethyst is a stone of spiritual protection and purification, cleansing one's energy field of negative influences and attachments, and creating a resonant shield of spiritual Light around the body. It acts as a barrier against lower energies, psychic attack, geopathic stress and unhealthy environments.
Love goddess Venus, lover of all things beautiful, rules Taurus and this vibration also influences your inner mood making you a sensitive and caring person, which means you are well liked but can be taken advantage of. When in love, you give your all, but expect the same back. And if you feel suspicious of your partner, you can be possessive and controlling. When your desires are not met or you are disrespected in some way and become hurt, you can close off and repress your emotions, giving you time to sort out in your mind and heart how the land lies. If treated well, you are open, loving, and sensual; the best ever lover or friend. Your emotions are soothed by your surroundings and you cope better with life if those surroundings provide security and comfort.
Reference: Unknown Source