Black Rutilated Quartz 10mm Round - 15-16 Inch R0471 decays and is exposed to

decays and is exposed to mineral-rich water

an opaque silicon dioxide mineral and form of microcrystalline Chalcedony

creating veins and mottling that ranges in color from rust to black

where it was mined since around 300 BCE

Argentinian Blue Onyx and Argentinian Aquamarine Onyx

Black Rutilated Quartz 10mm Round - 15-16 Inch R0471 decays and is exposed toRutilated 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