Blue Eyris Pearls - Pearls from the sea creatures known as abalone are incredibly rare. They cannot be cultured like the pearls from mussels and oysters; abalone are all hemophiliacs. They bleed to death when injected with a nucleus. in nature
Opalized snail shell from Coober Pedy, South Australia; one of the leading opal mines in the world. Also, read more on Coober Pedy. One of the hottest places in the world, yet residents live in honeycomb caves that stay nice and cool all day.