Plant roots display very sensitive growth patterns to a range of chemical and gravitational stimuli. Some fascinating research was done on this by Kolisko and Fyffe in 60's. Differences in crystalline structures due to subtle sub-magnetic forces in the lattice holding the molecules in place. Contaminant molecules can radically alter crystallisation patterns. Jack Temple freaks go even further than Steiner and claim that different individual crystals or places have different healing powers.
Different places have different geo-magnetic characteristics.
Metals, petroleum, carbo veg and a few other remedies do not naturally contain water of crystallisation, but they are potentised through an aqueous medium or using Sac lac which does have water of crystallisation. Iron is also the major 'contaminant' of all crystalline minerals, meteorites, etc. Lumping all this together suggests the common factors of water and water of crystallisation, plus sub-magnetic forces as being important in some way with potency energy. Such subtle forces would then be trapped within the crystal lattice until it re-dissolves in water or is demagnetised. It is certainly true that many minerals of virtually identical chemical composition are very different in their physical properties, their crystal structure and their colour.