Category: Quartz variety
Chemical formula: Silica, SiO2Color: 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
Grey 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 Grey Agatehas an anti-depressant quality.