Category: Quartz variety
Chemical formula: Silica, SiO2
Color: White to grey, light blue, orange to red, black.
Mohs scale hardness: 7
Primary Chakra: Varies by type and color
Astrological sign(s): Gemini
Vibration: Number 7
Agate can help those who have repressed emotional issues that need to be addressed so that they can let go (release) and heal. Many feel that Agate has an anti-depressant quality.