You will receive one Selenite Sphere similar to what is pictured. These spheres seem to glow with their own luminescent energy!
Selenite is one of the best Reiki stones out there. It works to clear all of the chakras and blasts "white light" outward. This "palm stone" is fantastic for chakra work, but you could also use it as a center stone in a larger grid. If you need a quick way to raise your vibration for lightwork or clairvoyant work of any kind, you can hold the selenite and say, "I request to attune to this selenite, now please." Don't use it in an outdoor grid though, it will get all crumbly and yucky when exposed to water.
The name selenite comes from the Greek moon goddess Selene. Selenite is associated with purification, energy work, and balancing the Crown Chakra.