Green Onyx is a substitute for Emrald. It is beneficial for boosting or strengthing the mercury and helps to reduce anxiety and connection issues. It can be used for multiple purposes, if you’re aware of your planet’s position or if you have got a recommendation from an astrologer you may buy it, also note we send the complete ring made of silver. To order an adjustable Green Onyx silver ring buy now. As it is a substitute we have a special recommendation to wear 7-9 carat stones for better results. Ring’s designs may vary.