1.4" Lustrous Rutile Crystal - Graves Mountain, Georgia
This is a rutile crystal with a mirror-like luster. The crystal measures 1.4" long, and has some stress fractures through the center of the specimen.
Rutile is an oxide mineral that is composed primarily of TiO2, although iron is a typical chemical variation. It comes in a wide variety of crystal forms, from lustrous metallic-like crystals, thin straw like crystals, to even deep red crystals with slight translucence. Rutile has also been know to form needle-like inclusion with other minerals, commonly forming with quartz. Rarer polymorphs of rutile (TiO2) include anatase and brookite, both of which have unique crystal structures.