An experimental study of the optical properties of two types of metal-dielectric composites based on opal matrices was carried out:
1) layered structures obtained by successive deposition of metal and dielectric films on a monolayer of opal globules, where extraordinary transmission and extraordinary absorption of light were detected due to the excitation of surface plasmon polaritons of various types;
2) "massive" opal samples, which were infilled with metal by electrothermodiffusion, where an asymmetric form of Bragg resonance curves was observed, due to the Fano resonance.