A stone of knowledge?

Dominica Arcana

You'd like to build your own academy? You? Without help? It's your own business, in the end, but I can help you. Some of my customers are explorers from the eastern part of the continent, and they sometimes pay me with these strange stones. I know they're especially prized by master alchemists. If you like, I can sell them to you, but you'll have to pay me in pearls. They're worth more than gold, to some.