Selenium is a metalloid, which has more nonmetallic than metallic properties. Chemically selenium resembles sulfur, but it is less reactive than this. Nonetheless selenium very rarely occurs in nature in its pure form. Every life form on earth needs selenium in small amounts for different proteins and amino acids. However, if the dose is too high, it quickly becomes poisonous. Hydrogen selenide and many other selenium compounds smell terrible, worse than the accordant sulfur compounds.
Amazing Selenium element standard density cube 10x10x10mm, 99.99% pure. Sample weighs 4.7 grams which is the theoretical density of the Selenium element itself. This cube is amazing for any science classrooms, schools, universities and collectors. Pure Selenium metal cube for element collection.
It must be handled with gloves!