This jade massage ball seems to be made of two different jades. The ball is more waxy and a consistent green. The handle feels more glassy and shows lovely patterns. Read about wand use here. Use this one for gently thumping. Vigorous could have some or all of it flying out of your hand. If ball does separate over time, its easy to glue back in.
The crystal is said to strengthen the heart, kidneys and the immune system. It assists with feminine problems, balance nerves and calm down the heartbeat. It guides you to discover the source of the feelings causing emotional energy. And learn to embrace and accept yourself exactly as you are. Said to bring good luck and friendship. Read more on the Healing tab.
The Xiuyan jade massage ball currently on offer is very similar to that in the photo.