Black Rutilated Quartz 4mm Micofaceted Round - 15-16 Inch "Dzi" Agate which comes in many forms

which comes in many forms and color variations

It is a particularly unusual gem because it exhibits a special optical property known as tenebrescence

cachanance

Yours is truly one-of-a-kind

The holes in these beads are straight

Black Rutilated Quartz 4mm Micofaceted Round - 15-16 Inch "Dzi" Agate which comes in many formsRutilated Quartz is a silicon dioxide mineral with unique needle 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 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, they