Citrine:

Citrine is a variety of quartz crystals known for their yellow to golden-yellow color. It is often used in crystal healing and is believed to have various properties that can benefit the body and mind. In chakra healing, citrine is often associated with the solar plexus chakra, which is located in the stomach area. The solar plexus chakra is related to personal power, self-confidence, and self-esteem. It is believed that citrine can help balance and energize the solar plexus chakra, promoting confidence and self-assurance.