Approximately 2.25 inches 
Carnelian is a wonderful stone for self-esteem. It helps the wearer to develop and maintain a healthy self-image. Carnelian helps one to be more outgoing and sociable. It is a warm, friendly, and easy to get along with. This stone is also an excellent aid to help those who are seeking to rebuild their self-esteem after a setback.
 
The red Carnelian stone benefits your sense of stability and security. It makes you feel safe and grounded, like nothing can harm your energy. It fills you with strength and confidence. If you have the other form of Carnelian, an orange stone, then the sacral chakra is where it will direct its power.
 
Calms anger, banishes emotional negativity and replaces it with a love of life. Carnelian boosts fertility and stimulates sexuality. Carnelian treats lower back problems, rheumatism, arthritis, neuralgia and depression. It regulates the kidneys, and accelerates healing in bones and ligaments.
 
Carnelian opens your Sacral chakra, which flows with physical and sexual energy. When you open both your Sacral and Heart chakras, you can find healthy, fulfilling love. Carnelian lights you up with sexual vibrations and the people around you can feel it through your aura.