Idiommata iridescens is a species of mygalomorph spider in the Barychelidae family. It is endemic to Australia. It was described in 1918 by Australian arachnologists William Joseph Rainbow and Robert Henry Pulleine.
The species occurs in eastern Queensland in open forest habitats. The type locality is Eidsvold in the North Burnett Region.
The spiders are fossorial, terrestrial predators.