Twisted Gypsum is a selenite - opens the higher chakras of crown and third eye, selenite is also blessed by the power of Moon Goddess Selene. It is a memory strengthening divination stone that guides your path and takes you to your destiny.
Approx 11cm by 5cm. Photo and size are a guide.
Disclosure: If you are worried about your health always see your doctor first. There are no guarantees with crystals, but they may enhance your life.