From Morocco—What makes this “Thumbprint” Satin Spar Selenite, is the visible surface striations & layered growth rings. This mineral slowly crystallizes under  fluctuating environmental-shifting and pressure. This is what creates the fine waves visible on the surface.
Otherwise, its properties as Satin Spar Selenite are below.
 
This type of Selenite has the highest piezoelectric charge. A great tool to keep one’s energy field clear, keep space/home clear of negative energy and clear crystals and stones -Clears energy blockages -Induces inner alignment -Inspires one to release insecurity & reach for ones desires -Facilitates healing, auric cleansing, upper chakra activation & spiritual attunement -Communication with the Higher Self, spirit guides & angels -Cuts cords of dysfunctional energy from the etheric body -Acts as a tool for enlightenment Provides the link between spirit & matter