The fractals in fire and ice crackled quartz produce a mysterious appearance while providing tons of flexibility to the crystal’s energy supply. They are very energetic crystals with lots of rainbows on the many internal planes and fractures formed during the heating and cooling process, that magnify the energy of other crystals.
This tower and freeform both have rainbows within, which is to be expected in fire and ice quartz. Only the middle and right pieces are available, and you may view their videos here.