Rutile comes in a surprising contrast of distinct habits and colors, making it a very interesting mineral. It has multiple unique crystal forms as well as several telltale colors, styles, and associations. Rutile can range from mirror-like metallic-looking crystals, to dark reddish sub-metallic crystals, to bright golden-yellow needles. Even the opaque metallic-looking forms are somewhat translucent on edge under backlighting, with a dark red translucent tinge. Rutile is well known for its habit of forming needle-like inclusions within other minerals, especially Quartz, in the form of long and slender yellow straw-like crystals. These inclusions can range from scattered needles to dense parallel fibers within a host mineral.