coquina shells

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Shell covered beach, Saint Barthélemy Island

Pantone 459 color match. Tiny yellow Coquina shells.
My family and I went to Corpus Christi for a vacation the past few days. We had a great time, especially the kids. Made a few trips to the beach and found lots and lots of colorful tiny clams there.

Watch on the-earth-story.com

The classic test to see if a mineral is calcium carbonate demonstrated - dropping a bit of dilute HCl on to a rock made of shells (a coquina) and watching it fizz as the acid reacts with the carbonate.