Fun fact, you can make bank off shells

[about 47 t-rexes]

Normally you can only sell shells for a crown or two, but if you dismantle them you get pearls which are very valuable. The more you know

[asarokk]

And you fetch the highest price for them if you sell them to the Loan Shark merchant situated north of the Southern Gate marker in Novigrad. After cleaning him out, you just drop by again and his shop will have refreshed.