Swirls of shell colourings

This is an amazing fabric.  The pattern is taken off the outside of pipi or mussel shells and then coloured with gorgeous blues and purples.  Quite a large pattern repeat.  Each 'shell' is approximately 15cm or 6" square. 

Tukutuku is also available in multi colours of red/orange/yellow and green/blue. 

A real sixties treat.