Does anyone know the name of a sci-fi book from the 60's with people being abducted and put on another planet?

Question

people were abducted by a superior race by seeing a crystal and picking it up. There was also another species put on the deserted planet and the superior race wanted to see which species, the humans or the others were better.

Answer 1

You may be thinking of Dawn (Xenogenesis Series) by Octavia E. Butler