Amethyst tumbled stones are known as the stone of spirituality and the crystal to assist in alcohol recovery. Amethyst gemstones have long been called the sobriety stone. This healing crystal will assist in overcoming alcoholism, compulsive behaviors, and addictions of all kinds. Amethyst  crystals have also been used to help ease the pain of grief, and promote happiness. Amethyst polished stones are reputed to be beneficial when dealing with legal problems, and money issues, which can lead to prosperity and abundance. Amethyst is also used as protection for travelers. Amethyst crystal brings energies in mystical realms of stability, peace, calm, balance, courage and inner strength. Amethyst is also a stone of prosperity based on it's deep and glorious color. This healing crystal creates a protective energy field around its wearer, assists in transmuting negative energies within the wearer and gives protection from external negative energies. Amethyst is excellent for meditation.  It is often used in metaphysics and crystal healing to protect against psychic attacks. On the spiritual level, amethyst is said to help open to communication with angels, telepathy and other psychic abilities. It is thus an excellent stone for meditation or dream work, past life work, and to help you see your path. Assists in growth to our higher potential. It is known to prepare the soul for intense transformational journeys. Gives spiritual cleansing and expansion. Amethyst is known to  help with headaches, insomnia, arthritis, chronic fatigue, fibromyalgia, immune system deficiencies, asthma, phobias, menopause, PMS, and general healing. Amethyst is associated with the brow and the crown chakras. 
Average size .75 - 1 inch.  Colors and sizes vary.