We got this blank from our friends at Mutt Blanks... the originator of the Lava Lamp blanks. Ribbons or turquoise, blue, red, green, and yellow are all embedded in a light blue tinted translucent resin.. It reminds me of a spring flower bed.
The internals were not polished on this pen, so is not translucent. If you'd like the pen polished to a demonstrator level, make a note at checkout. There will be a nominal fee for polishing the inside ($40)
This pen will work with nicely with a fuchsia nib (pictured), turquoise, orange, or green