What would you trade for pearls
A woman appears in your bathroom mirror above your sink and shows you some pearls. She is is dressed in a traditional Javanese batik kebaya and sarong. She gesticulates that she wants the shower curtain behind you. You agree. The mirror becomes liquid and out flows a pearl, You throw the shower curtain at the water mirror and it goes through but it creates some splashing but mostly in the sink.
She indicates she would like to trade some other pearls.
What do you try to trade?
The rules of exchange are as follows
Assume this woman is from Indonesia in 1598, the Dutch have only just arrived.
Any item sent through the mirror has to be able to withstand the equivalent of five hours soaking in water. This is the magic water portal through which it must pass. There is no loophole of wrapping the item in a modern waterproof container solely for transport. The item would still be submerged in liquid.
There is no audible communication, only visual through the portal.