I don’t feel there are any bad combinations of crystals that should never be put together.
I do think that some crystals will cancel each other out ~ not in a bad way at all, but by sending a confusing message to the universe as far as which vibrational frequency that you are trying to entrain with.
For example Carnelian is a stone of energy: it’s a stone that really helps to boost energy.
Another stone is Blue Lace Agate. Blue Lace Agate does the exact opposite of what carnelian does. It calms energy down.
So if you were to put these two stones together in a combination of any kind, for instance a mojo bag or a crystal grid, that would be really confusing!
You’ve got to ask yourself what are you trying to achieve?
Do you really want to calm things down or do you want to boost the energy? This might be a combination that would cancel each other out.
It’s not the same for everyone, but for most people these are the types of energies that one will get from Carnelian and Blue Lace Agate. If these are the types of energies you’re getting from the stones, putting them together is going to cancel them out.
Yes, there are combinations that will negate each other, but I don’t think that there are any bad combinations.