The thick inner layer of the shell is composed of nacre or mother-of-pearl, which in many species is highly iridescent, giving rise to a range of strong and changeable colours. Predominantly deep blues greens and purples. The shell of abalone are convex, rounded to oval shape, and may be highly arched or much flattened. The majority of abalone species are found in cold waters, off the Southern Hemisphere coasts of New Zealand, South Africa and Australia, and Western North America and Japan in the Northern Hemisphere.
Abalone Paua Shell & 925 Sterling Silver Earrings OPNZSREYB