At home I have a jar filled with shells, most of which I collected whilst living in Mauritius.
This Sea Urchin shell is one of several that are in the jar. We used to call them “Pumpkin Shells”…a very appropriate name when you look at their shape. Sadly, some of the shells broke in transit when we moved countries a couple of times.
Ramblings and Thoughts 
What a beautiful shell! Looks like a jeweled pin cushion. 🙂