Sand Dollar
In 1982 I worked as a contractor at the National Weather Service, contributing in a small way to the forecasting of storm surges due to hurricanes. I was in Texas for a couple weeks surveying the coast in support of our forecast model for a few large sections of the coast, basically looking for situations where the coastal terrain was significantly different to what was recorded on topographic maps. We were on a barrier island at one point and came across a huge number of sand dollars, all washed up on the beach. I collected a few and they have been in a ceramic jar ever since. This is the sand dollar at the top of that jar.