Iridescence is an interference effect and is closely related to the cloud corona. Near the sun there is no real distinction between them other than the iridescence isn't in concentric rings. It can be seen quite far from the sun though it is usually less striking further out.

Please be careful !   Always shield the sun and use proper eye protection against the remaining glare.

The edge of the corona breaks up

Distorted corona Iridescent bands

Coloured bands can occur in some clouds

Iridescence can be seen further from the sun

Iridescence further from the sun Iridescent mist

Iridescence can also be seen in fresh formed mist

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