Amethyst: Supports the nerves, lungs, skin and intestinal tract. Lowers blood pressure. Rose Quartz: Strengthens the heart, improves Blood circulation. Encourages fertility in women. Chalcedony: Strength of character, self-determination, spiritual freedom. Helps with anxiety and depression Petrified Wood: Grounding, stability and the ability to change. Effective for claming the nerves, for the digestion, metabolism and elimination. Ocean Chalcedony: Strength of character, self-determination, spiritual freedom. Helps with anxiety and depression.