coquina shells


Shell covered beach, Saint Barthélemy Island


Every type of modern seashell you might want, Ft. Myers Beach, Florida

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 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.