Translation of gemstone in German

Then we did a boat trip which started somewhere in the delta and ended somewhere else in the delta. Each couple received a boat and an elderly lady had to row. I did not feel comfortable with that.
It seemed that the fisherman and his daughter did not intend to keep on rowing unless we would buy something and we were really annoyed by that and did not hide it. In the end they passed.
The road was a really horrible, but the lakes and the surrounding woods were colorful and impressive. We drove for two hours through the forest towards San Martin de los Andes, but decided to turn back before it got dark.