Yes, different gems can be mixed, they add their forces, enhancing their benefits.
Our body always seeks balance and when it has several gems, it absorbs the energy it needs from each one at all times.
But there are gems that CANNOT BE MIXED BECAUSE ITS EFFECT IS NEGATIVE.
Like the Onyx with the Tourmaline, the Tourmaline with the Obsidian or with the Malachite.
