👉 "Tellurite" is a mineral and an element, often referred to as aluminum silicate. It is the lightest known element in the periodic table of elements, with its atomic number 13. Tellurite is typically found in quartz crystals, but it can also be formed from other minerals such as calcite or rutile. Tellurite's properties are complex and vary depending on its crystalline structure. It has a high melting point (around 500°C)
