You have a question, a hypothesis and designed an experiment to test it. The study had a harder question: "What properties of crystalline stones attracted them

You have a question, a hypothesis and designed an experiment to test it. The study had a harder question: "What properties of crystalline stones attracted them?". The abstract has this answer: "We found that transparency and geometric shape were the two attractors guiding chimpanzees." Maybe this is scientific proof for the diamond industry.