Petra I : MATERIALS Slices of Polished Clear, Rose or Smoky Quartz Aged BrassFINISH Aged BrassQUARTZ Clear Quartz Slice, Rose Quartz Slice, Smoky Quartz SliceFIXTUREPetra I Mono 11.8 x 3.9 x 11.8” (300 x 100 x 300 mm) 8 WPetra I Twin 11.8 x 4.7 x 17.7” (3