I love the stuff.
Just about everything I do has some irid in it
Try it over opalescent with a glue or sandblast resist over the irid and
fuze together and you can get some great effects.
One can use it in mosaics,
On strip bowls it can cause problems, as
you have to watch lining it up face to face as it will not bond.
On drop rings it does not hold together as well as non-irid.