This 99.95% Pure Molybdenum Sphere has a diameter of 2.1750" and a weight of approx. 2 lbs. This sphere is an excellent contemporary addition to your desk at work or side table at home. With a density of 10.2 g/cc, this spear is very heavy despite fitting in the palm of your hand. If you are interested in elements like Molybdenum, make sure to check out our 5-piece element set!