Amethyst 
This purple and white stone is a wonderful healing and cleansing tool. It puts us in touch with our intuition and stimulates self-healing. It is marvelous for insomnia if kept under the pillow and helps straighten out the overemotional and frightened. If you have a headache, place the Amethyst on your forehead for relief.
Amethyst is a good beginners crystal and is a basic for any crystal user.
Aquamarine 
Known also as the 'water stone', it can prevent seasickness, get rid of water retention and help purify drinking water. It is especially good to place in your daily glass of water. Aquamarine also helps clear thinking and negativity.
Bloodstone 
As the name suggests, it helps people with blood disorders. It helps cleanse the blood and is believed to make us more courageous and able to face difficulties calmly.
Coral
A wonderful aid to digestion, coral helps to overcome toothache and gum problems - although it is no substitute for proper dental hygiene! It also encourages self-esteem and positive thinking, balancing out feelings of worry about what other people think of us.
Diamond
This precious gem is a powerful crystal. It is believed to stimulate a sense of direction in life and help strengthen one's courage. Just wearing one in a ring will not, however, give you these qualities. Like any other crystal, you need to create a bond with the crystal by talking to it, stroking it and cleaning it regularly.
Emerald
The stone of true love. Emerald can help generate insight into a relationship - which may or may not be welcome. It also bestows psychic ability, heals inflammation and promotes a feeling of inner peace and relaxation.
Garnet
This stone is good for balancing out sexual problems. Both overactive sexuality and repressed urges will benefit from the power of Garnet. It also encourages assertiveness and helps to regularize blood pressure.
Kunzite
Discovered in 1902, this stunning pink stone is superb for women who have gynecological problems that are due to difficulties in accepting their femininity and also for women who need to come to terms with all aspects of their sexuality. It is a reassuring, healing, calming stone.
Lapis Lazuli
Honored as a royal stone by the ancients, this blue and gold stone has always been believed to open the inner vision and to create a link between this world and the inner realm. High priests used to wear it ground up as eye makeup, and in jewely during rituals. It is good for anyone undergoing spiritual awakening or instruction in a particular religion.
Opal
This highly sensitive stone has had 'bad press' for years. There are many people who believe it is unlucky, but its reputation is the result of a story by the writer Sir Walter Scott - and has no truth in it at all! Opal does need to be treated with care, for it chips easily.
It's a water stone and loves being soaked in cold water and benefits from being left in the moonlight from time to time. Opals reveal the state of your physical and emotional energy, being dull when it is low and brilliant when it is high again.
Pearl
A stone of triumph over adversity, of making the most of an unpromising start, it is a gem of hope and inner strength. If a pearl loses it luster, it is unlikely to regain it - it is believed to have lost its lifeforce.
Quartz
Clear Quartz has stimulating male qualities and opaque or milky quartz is the receptive, female stone. If you are given to brooding upon the unfairness of life, hold on to the clear quartz. If you need rest and insight, choose the milky sort. Rose quartz is gentle - useful in times of high emotion, like the break up of a relationship or bereavement. Along with Amethyst, no person serious about crystals would be without this powerful stone. More Quartz info click here.
Sapphire
A stone of control, it helps overcome temptation and guides one's thoughts on to higher things! Star sapphires are deemed especially significant, for the help guide people whose dreams and ambitions will one day benefit humanity.
Tourmaline
This stone refuses to absorb or retain any negativity. It is a stone of transition, both physical and emotional, and its beauty helps the process of birth, menopause and death, as well as other rites of passage. It is good for people who feel the world is against them and for those who have a great need to forgive - especially themselves!
Turquoise
Ancient symbol of the sky, this stone benefits lungs and throat, and because it contains a good deal of copper it is a superb conductor for the healing force. It is also good for those terrified of speaking in public or of appearing physically or emotionally weak.