Each of our VitaJuwel gem vials is handcrafted by master glassblowers in Bohemia. They use premium, lead-free glass and hand-selected gems. The process of heating, melting and cooling of a single vial takes about 24 minutes and is patented worldwide! All of our gems are fairly-traded. Before used in our gem vials, they are cleaned thoroughly in a special, 8-step process. The special liquid inside the gem vial prevents the crystals from getting mossy and the vial from getting dim. It's natural and harmless, even if accidentally swallowed.