Medium Selenite Satin Spar Spheres.
These vary slightly in size but measuelre approximately 8cm ik diameter amd weigh 580g-630g
Selenite is believed to offer benefits including promoting mental clarity, reducing stress and anxiety, and fostering spiritual growth and connection to higher realms. It is also used for its cleansing abilities, helping to clear blocked energy from the mind and space and to cleanse and recharge other crystals. Physically, it's thought to aid in pain relief and support the skeletal and nervous systems.  
Please note that Selenite is very easily scratched/breaks with even slight impact. It must not get wet! It is difficult to carve and often has slight imperfections.