“Malachite is associated with the number nine, and the zodiac signs of Scorpio and Capricorn. In astrological reference it is also associated with the Planet Venus.
Malachite has been called the ‘mirror of the soul’. It is variable in its condition. It reaches the inner feelings of the person and reflects what is there, negative or positive. It reminds us that we have a dual nature and it is up to each person to know and rule his own person.”
This seems like an appropriate stone for Loki, how He can expose the underlying truths, and show them to us whether we are ready to see them or not.