Encasing heavily reduced Nyx can produce a mother-of-pearl effect.  Speckled and swirled organic effects can be acheived by working the glass very hot before application.  Excessive reduction followed by kiln striking can produce earthy caramel tones. Tips:    We recommend kiln striking a rod of Nyx to estimate the kiln striking time at your annealing temperature.  Our kiln striking tests were perfomed between 950 and 970 degrees F.  One hour annealing time produced Midnight blue, while Sky Blue  tones developed over three to four hours.  Higher annealing temperatures push the Sky Blue to a greenish color.  Encasing may alter kiln struck color. 
Nyx is not just a new color but a new kind of color.  Nyx will reduce  to a mirror-like or multi-colored luster, as you'd expect from a Double Helix color, but Nyx does something else!  Though the rods start out black as Night, Nyx will kiln strike through a steady fade of  Midnight Blue, Lapis, Peacock, Turquoise, and Sky Blue.  You can determine the coloration through annealing time, temperature and placement in your kiln.