What is Rutile?
Rutile is titanium dioxide, a dense tetragonal oxide prized for brilliant crystals, needle-like inclusions in quartz and its importance as a titanium ore.
Mineralogy and crystal structure
Reference formula: TiO2. Rutile is tetragonal and commonly forms slender prismatic crystals or fine needles enclosed in quartz. Titanium substitutions and surface coatings affect colour, but the TiO2 structure remains the mineralogical anchor. Rutile is classified with oxides and has a tetragonal crystal system. Typical hardness is 6–6.5 on the Mohs scale and specific gravity is approximately 4.2–4.3.
Colour, lustre and habit
Typical colours include red-brown, black, golden, yellow, silver-grey. The usual prismatic, acicular, reticulated habit and adamantine, metallic, sub-metallic lustre help describe a specimen, but colour alone is not diagnostic.
Formation and notable localities
Rutile forms in or is associated with igneous and metamorphic rocks, alpine fissures, hydrothermal veins, beach placers and high-grade ore deposits. Important documented localities include Brazil, Switzerland, Madagascar, Norway, the United States, Australia and India.
Brilliant needles and a high-value inclusion story
Rutile sells in two complementary forms: sharp metallic crystals for collectors and golden or red needles inside quartz for the jewellery and lapidary market. The inclusion pattern, transparency and locality create the premium.
Collecting and care
Protect sharp crystals and polished quartz inclusions from impact. Clean with mild water and avoid harsh acids or abrasive polishing.
