Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Q: Passage: Some minerals are valuable simply because they are beautiful. Jade has been used for thousands of years in China. Native Americans have been decorating items with turquoise since ancient times. Minerals like jade, turquoise, diamonds, and emeralds are gemstones. A gemstone is a material that is cut and polished to use in jewelry. Many gemstones, such as those shown in Figure below , are minerals. Answer: turquoise
A:
Which mineral do native americans use to decorate items?