These properties include:

• Common to almost all ancient cultures, carnelian was considered a lovers' stone. Many have reported its potent romantic effects, claiming that carnelian has gotten them attention from new romantic interests and even potential soulmates.
• Since antiquity, carnelian has been worn with the thought that it could ward off mental health issues like insanity and depression.  
• Carnelian is associated with the solar plexus chakra, where it is thought to resolve  digestive problems, as well as lack of confidence.
• A widespread belief of carnelian was that it heightened your sexual energy, aligning your energy so that you're at your sexual peak. Wearers report increased sex drive, that they are more able to attract others, etc.
• The Romans thought carnelian was a stone of courage. They wore it to shore up confidence and strength.
• Ancient Egyptians decorated their dead with carnelian to assist with their journey into the afterlife.
• In contemporary times, carnelian is thought by some to enhance self-esteem and creativity, to combat feelings of inadequacy, to increase physical energy and overcome insomnia.