Rutile

Rutile


Composition: TiO2
Crystal System : Tetragonal
Colours: Black, greyish black, brown, reddish-brown, yellow
Lustre : Adamantine, metallic, sub-metallic
Hardness (H) : 6.0-6.5
Specific Gravity (S.G) : 4.23

Distribution

Common.

Occurrence

  • Hypogene
  • Country Rock

Paragenetic and General Notes

Rutile is encountered as a rare accessory mineral in the hypogene mineralisation, where it is generally observable only in polished section. Very rarely, discrete orange-brown prismatic crystals (to 2 mm) have been observed in tennantite-sphalerite ore (Joy Desor, personal communication to M. Southwood, February 2017).  

Rutile also occurs as detrital grains in the feldpathic sandstone ("pseudo-aplite") bodies, derived from the Tschudi Formation.