Apatite can exhibit chatoyancy — an uncommon optical phenomenon in some stones that resembles the light reflection of a cat’s eye
The inclusions can be so dense as to make the clear Quartz nearly opaque
Sometimes called the "Black Prince's Ruby" for its role in the English crown
They are versatile and simple
without the play of color present in more precious varieties
Multi Rutilated Quartz 5x8mm Chip with Spacers - 15-16 Inch Pendants Apatite can exhibit chatoyancy —Rutilated Quartz is a silicon dioxide mineral with unique needle to like inclusions of Rutile. These needles usually appear golden, but can also appear silver, red, copper, or black and can be distributed randomly or in bundles or star to like formations. Rutile is the mineral name for natural crystals of titanium dioxide, which may contain iron oxide. When the level of iron oxide is high, the inclusions appear more golden or copper, when it is low,