Spinel rough stone-baolong.com Spinel is a mineral composed of magnesium-aluminum oxide. Because it contains elements such as magnesium, железо, цинк, manganese, и т. д., they can be divided into many types, such as aluminum spinel, iron spinel, zinc spinel, manganese spinel Spar, chrome spinel, и т. д.. Because they contain different elements, different spinels can have different colors. Для […]
