Iolite exhibits pleochroism, which means it absorbs varying wavelengths of light based on the angle of incoming rays or their polarization plane. As a result, the gemstone showcases different hues depending on the viewing angle. When rotated, this Iolite reveals a spectrum of colors spanning from deep oceanic blue to a cool grey.  They cut mesmerizing gemstones

3.38 grams / 16.90 carats / 20.2 x 13.7 x 10.1 mm / should cut eye- clean or better  if orienting for a blue face