Roger Weller, geology instructor
firstname.lastname@example.org copyright 2010-R.Weller
rutile crystals in quartz-7
Rutile is titanium oxide. One of the crystal forms that it takes is that of slender
needles (acicular) embedded in large quartz crystals. Its color can range from
yellow to red, reddish brown to black with a sub metallic luster.
Photo is copyright free only for non-commercial educational uses.
Just credit photo to R.Weller/Cochise College.