An emerald snail fossil. All of the original snail’s shell has been replaced with crystalline emerald. This specimen is perhaps unique in the world, a priceless museum treasure.

There’s a opal shop inside the Hotel Del Coronado. Part of their displays include an opalized snail shell — not for sale. But I always asked anyway every time I went there, just in case. You never know when some naive and inexperienced clerk might just sell it to me.

emerald snail fossil