Er-erbium-68

Fun facts: Erbium adds a pink hue to glass and lasers, and it is key in fiber-optic communication. It's one of four elements named for the mineral-rich Swedish village of Ytterby, along with Terbium (Tb), Yttrium (Y), and Ytterbium (Yb). Great for: Glassblowers, optical engineers, Swedes, and fans of the “erb.” 420. Elevate your look with an Erbium atomic element hat from Lidnium. Crafted from premium washed cotton with precise Er symbol embroidery and an adjustable fit, this cap lets you stand out—whether you’re celebrating a milestone or powering through your day. Wearing a Lidnium cap adds a little juice to your day, and Erbium takes it to the next level.