Root (Sanskrit name is Muladhara) - this is the centre of the basic will to survive, security and safety. It is also important to our physical health, spinal problems, adrenals, legs, feet, bowels, and bones circulatory system and rebirthing. If blocked then an individual can feel fearful, insecure, problems can arise like lack of energy, and generally sickly.
Red Jasper helps clean and stabilize the aura, it dissolves blockages and helps circulatory problems and aid rebirthing, and it gives a sense of balance to the spirit and grounds you physically and emotionally.

Sacral (Sanskrit name is Swadhisthana) – the centre of feeling, emotion, sexual desire, and passion it is also associated with the ovaries, testicals, prostrate, bladder and irritable bowel syndrome.
Carnelian helps aids women reproductive organ, and increases fertility.  It assists impotence, emotional numbness, and calms irritable bowel but is also heals lower back problems, rheumatism and arthritis.  It regulates bodily fluids and the kidneys and accelerates healing in bones.  It also ensures a good supply of blood to organs and tissues.

Heart (Sanskrit name is Anahata) – Related to love, this chakra can mend emotional relationships as well as the body.  But if the heart becomes blocked then love is prevented from flourishing.
Green Aventurine helps protect the hearing and is a good heart healer. It aids nausea and negative emotions and thoughts, assists with well-being and is a good all-rounder.

Throat (Sanskrit name is Vissudha) – this is the power of speech and communication, an open throat permits the chakra to allow free expression, if blocked it can effect communication of ideas and feelings.
Blue Lace Agate powerful throat healer, it helps thyroid and lymph infections and removes blockages from the nervous system, also aid self- expression.

Solar Plexus (Sanskrit name is Manipura) - This is where emotional blockages occur; if this chakra becomes to open other people can take the energy. It also associated with self-confidence, willpower, stomach, kidney and liver.
Citrine helps stimulate the pancreas, spleen and digestive system; it helps with infections in the kidney and bladder and increases blood circulation. It is also a good crystal for self-esteem.

Brow/Third Eye (Sanskrit name is Ajan) – enlightens dreams and memory can help spiritual journeys and power, if helps you learn from others as well as have an open mind to other peoples ideas.  But if blocked, mental confusion arises then the imagination cannot function, also migraines, sinuses and insomnia can develop.
Sodalite opens up the third eye and alleviates pain especially headaches, migraines and sinuses. It aids respiratory, cleanses organs, and helps the immune system.  It helps relief insomnia and vertigo and lowers blood pressure. 

Crown (Sanskrit name is Sahasrana) – This is where spiritual energies are felt it also for joy and wellbeing. If this chakra becomes unbalanced it can cause a sense of frustration, with no spark of joy to life and a feeling of destructiveness. It may cause bad headaches e.g. migraines or depression. 
Amethyst calms the mind and dissolves anxiety. It strengthens the intellect and intuition, bringing clarity of purpose.