~ ~ STONES and their main benefits ~ ~
Agate - Balance. Harmony. Health. Stability.
Amethyst - Psychic Ability.  Mental awareness.  Helps in studying.
Aquamarine - Calm communication, and calm spirituality.
Aventurine - Happy heart stone!
Bloodstone - Help stop fear from life changes.
Carnelian - Energy, balance.
Citrine - Self-realization.
Fluorite - (violet) mental expansion.
   (blue)clear communication.
   (green) heal troubled relationships.
   (pink) stimulating and revitalizing.
   (brown and black) aid concentration.
   (white and clear) Protective shield of influence throughout the auric and physical bodies.
Goldstone - Opens your communication pathway.
Hematite - Removes negative energies,  Calming.  Harmony within yourself.  Grounding.
Howlite - Reflects and transfers spirit energy throughout the earth body, and cleanses the
mind and emotions of negative thoughts and images.
Jasper - Confidence.  
   (red) protection.
   (yellow) clears the mind.
   (brown) aids concentration and may be worn for centering and grounding.
Labradorite - Stops others from taking your energy.
Lapis Lazuli - Psychological strength.
Malachite - Power, Protection, Love, Peace, Business success.
Obsidian - Protection, Grounding, Divination, Peace.
Pyrite (Fool's Gold) - Wisdom.
Quartz Crystal - Healing.  Confidence.  Works well with all chakras.
Rose Quartz - Self Love.  Brings love, peace, and joy to yourself.
Smokey Quartz - Neutralizes Negative Energy and Tension, Grounds.
Sodalite - Communication.  Enhances your creativity.
Tiger's Eye - Power.  Protection.
Turquoise - Spirituality.  Tranquility and peace.
Unakite - Grounding, balance, and stability.
This list was compiled from a large stack of books.  
Not any particular author.