The reddish colour is due to iron (III) oxide in the surface minerals.
在红颜色是由于铁（三）在矿物表面的氧化物。
In several reactions a colour change indicates the formation of new products. For example, green copper carbonate reacts, when heated, to form black copper oxide and carbon dioxide gas.
在一些反应中颜色会发生变化，它表明产生了新的物质，例如，绿色的碳酸铜在加热时会分解为黑色的氧化铜和二氧化碳气体。
Cement clinker of green colour can be obtained by using chromium oxide am a colorant.
以氧化铬作为着色剂，可以烧成绿色水泥熟料。
A basic variety of aluminium oxide, white colour its hardness is higher and toughness slightly lower than that of a.
刚玉的基本品种，白色，与棕刚玉相比，硬度高、性稍低。
A basic variety of aluminium oxide, white colour its hardness is higher and toughness slightly lower than that of a.
棕刚玉的派生品种，磨料由微小晶体构成，颜色与棕刚玉相似，强度高。
The addition of tin oxide has a stabilizing effect on the colour.
添加氧化锡能增加颜色的稳定性。
Usually the colour founded on it are either dye additives or Limestone Ferro(iron) oxide. Long term consumption may caused kidney stone.
若燕富有颜色，它肯定是人造色素或长期食用造成胆结实的岩石水。
The Light Iron Oxide Red possesses high coloring intensity with gay colour. It could be widely used in floor tiles and wall ones.
浅色氧化铁红具有高着色强度和高鲜艳度，可广泛用于地砖及面砖；
The Light Iron Oxide Red possesses high coloring intensity with gay colour. It could be widely used in floor tiles and wall ones.
浅色氧化铁红具有高着色强度和高鲜艳度，可广泛用于地砖及面砖；
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