The sapphire, together with the ruby, are members of the corundum group, which is the mineralogical name for aluminium oxide that crystallised into gemstones a long time ago as a result of pressure and heat at a great depth.
Vascular Neurology Doctors and Physicians (Vascular Neurologists) Vascular neurology is the study and treatment of vascular diseases of the nervous system. A neurologist is a physician who diagnoses and treats nervous system disorders. A vascular neurologist treats patients who have disorders of the veins and arteries in the nervous system. Diseased vessels that provide circulation to the nervous system can generate problems such as a stroke or hemorrhage that affects the brain or spinal cord.
A pulmonologist, or pulmonary disease specialist, is a physician who possesses specialized knowledge and skill in the diagnosis and treatment of pulmonary (lung) conditions and diseases. Thank you for using ChaCha! [ Source: http://www.chacha.com/question/what-does-a-pulmonary-doctor-do ].