Colorful rocks

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I collected these rocks in about two minutes yesterday, as I was walking along a favourite stretch of Lake Superior. This beach runs for a mile or more, and is littered with rocks of every colour and size. It is worth a visit, even though it is a little out of the way, just to see these colourful and interesting stones that have been smoothed and polished over the centuries by the waves.

Agates

The multi-coloured pebbles on New Aberdour beach the result of glacial deposits which form some of the soft sandstone / composite rock found at this location. View On Black

This incredibly rare Iris Rainbow Agate slice is from Indonesia. It looks like a regular slice of agate until it is viewed through transmitted light, and then an incredible spectrum of colors appears. Scientists have said that less than 1% of agates in the word display these rainbow qualities.

The illustrations below come from German scientist Reinhard Brauns' 1903 book, Das Mineralreich (The Mineral Kingdom). Google Books offers the English...

Unique and rare Septarian brown stones are found along a narrow stretch of Lake Michigan shoreline. Read on to find out more about these fascinating stones!

One of my fondest memories as a child was racing across the beach, dodging the giant waves in search of striking shells and rocks. There is something magnificent about finding a rock hidden in the ground that hasn't been unearthed for hundreds of years. Unfortunately, the beauty of rocks and minerals found in the ocean doesn't last long; it recedes as the water evaporates from the rock. With a quick rinse of water, the beauty and memories come rushing back, and you are reminded of those…