Crystal system: Isometric.
Cell salt: Potassium chloride.
Colour: Yellow, blue or red.
Energy: Electric.
Element: Air.
Planet/sign: Gemini (exact cell salt equivalent); Jupiter/Cancer; Saturn-
Uranus/Aquarius.
Uses: The cubic shapes formed by Sylvine represent stability, establishment, balance and permanence. This stone may be used when you are feeling nervous, upset or insecure.