Isadora Paris Galalith Necklace - 1970's /1980's

Here is my latest find: a chunky galalith necklace by French designer Danielle Poullain, signed 'Isadora Paris'. It probably dates from the late 70's or early 80's. I love its bright shiny colors and its lovely Art Deco shape. Definitely one of the greatest necklaces of my humble jewelry collection...
Very few designers still produce galalith jewelry as it has become a rare and expensive material. Here is an interesting link about this one-of-a-kind plastic: http://en.wikipedia.org/wiki/Galalith