Spinel rough stone-baolong.com Spinel is a mineral composed of magnesium-aluminum oxide. Because it contains elements such as magnesium, 철, 아연, 망간, 등., they can be divided into many types, such as aluminum spinel, iron spinel, zinc spinel, manganese spinel Spar, chrome spinel, 등. Because they contain different elements, different spinels can have different colors. 을 위한 [...]
