Some Examples of An example of the optical effect called:

Over Perth, Western Australia

Cirrocumulus lacunosus, iridescence

Enrico Penolazzi

Altocumulus, iridescence

Over Auroville, Tamil Nadu. India.

Cumulus congestus pileus, iridescence

Over North Carolina, US.

Altocumulus stratiformis perlucidus, corona

Meggan Jack

Cirrostratus stratiformis, corona

Peg Zenko

Cirrostratus, corona

Angela Craggs

Stratocumulus stratiformis perlucidus, crepuscular rays

John MacPherson

Cumulus fractus, crepuscular rays

John Annesley

Cirrostratus stratiformis, anti-crepuscular rays

Dave Newton

Stratus, glory

Robert Seckold

Stratus fractus, glory

Mila Zinkova

Stratus fog, glory

Sitthivet Santikarn

, rainbow

Alan Russo

, rainbow

Ian Goddard

, rainbow

Linda Bennett

, rainbow

Stefan Binnewies and Josef Pöpsel

Stratocumulus, cloudbow, glory

Nick Lovibond

Stratus fog, cloudbow

Elizabeth Williams

Cirrostratus, 22-degree halo

Sitthivet Santikarn

Cirrostratus, 22-degree halo