Manganese can be added in small amounts to remove the green tint given by iron, or in higher concentrations to give glass an amethyst color. Manganese is one of the oldest glass additives, and purple manganese glass was used since early Egyptian history.
Here's What the Chemical Elements Look Like in Pure Form
10 Cool Facts You Didn't Know About Calcium: Calcium is a metal. It readily oxidizes in air. Because it makes up such a large part of the skeleton, about one-third of the mass of human body comes from calcium, after water has been removed.
Rock Layers: Timeline of Life on EarthEvolution is a complicated subject. While everybody understands that black bears are related to grizzly bears and we can even figure they are related to extinct bears, lots of people wonder how scientists can be so su
Vanadium is a chemical element with symbol V and atomic number 23. It is a hard, silvery gray, ductile and malleable transition metal. The element is found only in chemically combined form in nature, but once isolated artificially, the formation of an oxide layer stabilizes the free metal somewhat against further oxidation.
Rare earths are a set of 17 chemical elements in the periodic table, as well as scandium and yttrium, that are considered rare earth elements because they tend to occur in the same ore deposits and exhibit similar chemical properties.
Vanadium is a chemical element with the symbol V and atomic number It is a hard, silvery gray, ductile and malleable transition metal. Named after erythronium (Greek for "red") since, upon heating, most of its salts turned from their initial color to red.