Rough Emerald for Advanced mixer/extractor Power Coils

Hello! I have been farming up gems for cash to purchase some advanced power coils, I have more than I need but never really try trading. So figured id ask if anyone wants to trade for the emerald? If so let me know how many emerald per coil! Thanks!

I got five advanced mixer coil stored, that i can sell.
Is 50 emerald for each ok?

Let me know where to meet you and when!