A '''star sapphire''' is a [[sapphire]] with an inclusion of [[asterism]], very small [[mineral]] deposits of [[rutile]] (titanium dioxide) that naturally form within the sapphire to create rays (up to six) that reflect light, a white appearance on an otherwise blue-colored [[gemstone]]. | A '''star sapphire''' is a [[sapphire]] with an inclusion of [[asterism]], very small [[mineral]] deposits of [[rutile]] (titanium dioxide) that naturally form within the sapphire to create rays (up to six) that reflect light, a white appearance on an otherwise blue-colored [[gemstone]]. |