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Sea glass is physically and chemically weathered found on beaches along salty water shores. Sea glass comes from bottles and jars, and the force of the water and hitting off other objects in the sea cause the glass to develop new characteristic texture and shape. Sea glass takes 20-40 years, and sometimes up to 100 years to acquire these textures and shapes!

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Here you can see the checklist I brought with me on one of my visits to the beach. You can see that it has been completed by my younger sister, I wanted to see the difference between mine and her observations of the shells. It is clear that we both made very similar observations with some different impressions on colour, shape and texture.

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This particular piece of sea glass is in a triangular or diamond shape.

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This blue sea glass is very smooth, on both the surface and the edges of the glass. The glass is entirely smooth with no sharp edges at all, which is really very fascinating as to how this might have happened.

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The sea glass shown above is a deep blue colour.

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This is something that I was not expecting to find at Portmarnock beach, I have never actually seen sea glass before so I was very fascinated by it!

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Similar to some of the earlier shells I examined, this shell has a rough and bumpy texture with indents all over. The very bottom of the shell where the small opening appears, is however very smooth.

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This shell is in the shape of a cone. It also appears to be hollow with a small opening at the bottom that seems to spiral up inside the shell.

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The whelk has a purple/brown colour with some lighter brown showing on the raised ridges.

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This shell is very large in comparison to all the other shells. As you can see in the photo it is quite long beside my hand. It is long and rectangular in shape, although the ends do have more of a rounded shape than a straight line.

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Very similar to the banded wedge shell, this razor shell has also started peeling the top layer away. This leaves a a rough feel to the parts of the top layer that remains, but reveals a smooth texture underneath the brown.

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This razor shell has a very brown colour with some white and pinkish tones showing up as the top layer peels away.

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The banded wedge shell I found is quite interesting as it has started peeling! Much like an onion, the outer layer has started peeling and that layer feels similar to the outside layer of an onion. Under this peeling layer, the shell feels quite smooth.

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Similar to the mussel, this shell has an oval shape. If you opened up and separated the shell it would also resemble insect wings

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This shell consists of a mixture of brown and grey, with a tiny bit of yellow/cream. The very outer edge of the shell is more of a chocolate brown and then as you move inwards it becomes a darker greyish brown.

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The mussel has quite an oval shape, it strongly resembles butterfly wings.

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This shell is relatively smooth, there appears to be no holes or indents.

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This mussel is more of a brown colour, where I usually would see blue mussels along the beach. The inside of the shell shows a blue tone, while the outside is quite brown.

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The shape is not a very straight forward shape. It is a round shell, but it almost consists of three different spheres on top of each other, creating a spiral effect similar to a spiralling stairs.

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This shell is absolutely not smooth, it has quite a rough feel to it, with some small holes that I would imagine were caused by the force of the water. On some parts the shell is quite bumpy with some ridges and indents.

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This shell is mainly grey, with some white and a small bit of beige/brown

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This shell has a very much round shape. I would say it is an imperfect circle shape

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The shell has indents all along the top of it, when you run your finger along it you can very easily identify its bumpy texture. The ridges are actually quite raised, more raised than I would have thought, to me they resemble train tracks.

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This Common Cockle shell was found slightly buried in the sand which can be seen by the sand residue. The shell is a cream colour with some beige showing in the indents of the shell.