Also available with a quartz amethyst stone.
Natural amethyst crystal with metal chain and key loop. 
Size is about 1 1/4 to 1 3/4 inches
 
Amethyst is a meditative and calming stone which works in the emotional, spiritual, and physical planes to provide calm, balance, patience, and peace.
Amethyst is used as beneficial when dealing with legal problems and money issues, which can lead to prosperity and abundance
In the psychic and spiritual realms, amethyst is an excellent all-purpose stone that can increase spirituality and enhance intuition and psychic powers of all kinds.
Chakra: 3rd Eye,Crown 
Zodiac: Aquarius, Pisces
Planet: Jupiter, Neptune