A rainbow ring loops around the sun in a picture taken from Vancouver, Canada, and recently submitted to National Geographic's Your Shot. The solar halo is an optical effect created by ice crystals in high-altitude clouds, which refract sunlight and split it into its component colors.

Fire rainbow - a halo caused by the refraction of light through ice crystals in cirrus clouds

Stunning and Shocking Thunderstorm Photography - photography by Sean Havey, National Geographic

most intense weather photo I've ever seen.

Psychedelic rainbow over Mount Everest This is an event that is extremely rare to be seen among these mountains, yet one photographer, Oleg Bartunov, managed to be in the perfect place and the perfect time. Many others had visited Mount Everest, but none had been as lucky to be here at the same as Bartunov. It is said that this marvel is created from tiny ice crystals that are found within the center of these clouds –

The circumhorizon arc or 'rainbow clouds. This amazingly beautiful natural phenomenon can be observed when the sun rises high in the sky. The rays of the sun when it passes through high-altitude clouds composed of ice crystals in the form of hexagons. The sunlight is refracted in these crystals in bizarre way, and as a result, we see “fire rainbow”. This phenomenon is not local, it can extend over several hundred square miles

My dad taught me about these when I was a child. From previous pinner: Not every cloud has a silver lining; this multi-coloured cloud looks as if a rainbow has formed high in the heavens. The phenomenom - called a sundog - happens when ice crystals appear in clouds and refract the sun's rays. Photographer Robert Arn captured the cloud in Heyworth, Illinois, America. Picture: Robert Arn/solent

nature - such a show-off

This is a rare meteorological phenomenon called a skypunch. Ice crystals form above the high-altitude cirro-cumulo-stratus clouds, then fall downward, punching a hole in the cloud cover. Freakishly weird!

Ring around the Moon! The rings are caused by moonlight refracting off of ice crystals high in the atmosphere. Folklore says that a ring around the moon means that there's a storm coming.

Fire rainbows - We saw one just outside of Alamogordo, NM! The rarest of all naturally occurring atmospheric phenomena. The clouds needed for these rare events have to be cirrus and at least 20,000 feet in the air, with just the right amount of ice crystals. The sun also has to hit the clouds at precisely 58 degrees.

This 70-shot photo sequence shows a lightning display that occurred during a severe thunderstorm last summer on the island of Ikaria, Greece, near the southwestern coast of Turkey.

✯ Fire Rainbow - If the sun is at an elevation of 58 degrees or higher and cirrus clouds containing plate-shaped ice crystals are present, you may be lucky enough to see the rare "fire rainbow," or circumhorizontal arc.

Ice Halo

The Ice Crystal Rainbow

A light pillar is a visual phenomenon created by the reflection of light from ice crystals with near horizontal parallel planar surfaces

Fire rainbows are the rarest of all naturally occurring atmospheric phenomena. For a fire rainbow to occur, cirrus clouds must be 20,000 feet in the air with the precise amount of ice crystals, and the sun must hit the clouds at 58 degrees

Rocky Mountain National Park, Colorado