How Does Gemstone Healing Work?
Our chakras--like any aspect of our selves--are energetic patterns. These patterns can be disrupted--blocked, skewed, distorted, etc. Restoring harmony and order to the energy of the chakra will return it to a state of health--i.e., will heal it.
Anything that has a harmonious, orderly energy pattern can help to entrain our energy back to a harmonious state.
Crystals and gemstones have that inherent harmony and order in their energy pattern. Like anything with harmonious energy, they can be used to heal.
Each type of stone resonates with a slightly different energy pattern. The energy patterns of the different stones will relate more closely to the ideal energy pattern of one of your chakras, and its pure resonance can be used to help that chakra return to its ideal vibration or energy pattern.
Like any method of healing, the user's intention is critical. A pure healing intention makes the healing work.