Meet cobalt, a ferromagnetic, heat resistant metal. Medieval miners thought that kobolds had cast a spell on the shiny metal because when smelted it didn’t produce a precious metal but instead discharged toxic fumes. As an element, cobalt is only found in meteorites and the earth’s core, whereas a great number of cobalt compounds exist in the earth’s crust and in many soils. Cobalt is required for the manufacture of lithium ion batteries. 🔋 As it only melts at 1492 degrees, it is also irreplace

53K views · 2.3K reactions | Cobalt has been used to make blue glass...