Sela INFINITY Crystal Singing Bowl (Magenta) - 6.75"The Sela Infinity Singing Bowls stand out especially by their light weight and noble design from conventional Crystal Singing Bowls. Despite the lower mass, the Infinity Bowls prove to be very resonant and impress with a remarkable volume. The Infinity Bowl C4 has a diameter of 6. 75" (approx. 17 cm) and is made of 99. 9% pure quartz crystal. The material used is given excellent sound properties by a special manufacturing process in which quartz is