Home Rutile
IV - Oxides
Crystal habit of Rutile Rutile

Name   Rutile
Chemistry   TiO2
Hardness   6 - 6.5
Lustre   metallic adamantine
Colour   blood red, brown red, yellow brown to iron black
Streak   yellowish brown 
Density [g/cm3]   4.2 - 4.3
Crystal habit   tetragonal, crystals often prismatic, twins as knees [101], hearts [301], cyclic (rutile star)
Cleavage, Fracture   [110] perfect, [100] good, fracture conchoidal to uneven
other characteristics and occurrences   massive, granular, needles in clear quartz (rutilated quartz)
cat's eye = inclusions of rutile in quartz, tourmaline, ruby, sapphire
nigrite = iron black variety

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© 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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