Abalone shell

This is the shell of an abalone, which inhabit the California coast, as well as various other parts of the world. I think that this is a pink abalone, but am not 100% sure. You can't tell from the model, but the inside of the shell is quite iridescent - pink, blue, and green. Here's the CA Fish & Wildlife abalone ID page: https://www.wildlife.ca.gov/Conservation/Marine/Invertebrates/Abalone/Abalone-ID "The shells of abalones have a low, open spiral structure, and are characterized by several open respiratory pores in a row near the shell's outer edge. The thick inner layer of the shell is composed of nacre (mother-of-pearl), which in many species is highly iridescent, giving rise to a range of strong, changeable colors, which make the shells attractive to humans as decorative objects, jewelry, and as a source of colorful mother-of-pearl." (https://en.wikipedia.org/wiki/Abalone)