The mineral is obtained from beach sands and usually contains about 95-97% titanium dioxide with impurities such as iron oxide, chromium oxide and silica. In the high lead rutile glazes it usually constitutes about 10 -15% of the glaze recipe. Copper glazes containing rutile may show interesting mottled effects, whilst in high zinc glazes it develops an orange-tan colour. In lead glazes rutile tends to matt the surface, even in small amounts, but in leadless glazes much less so. In other respects, apart from colour, rutile behaves much the same as titanium dioxide.
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