Color: Many Colors (opal changes color) Opal, the only gem that doesn't fit into any single description of a precious stone, is the birthstone for October. It is said that no two opals are exactly alike. But it is sensitive to moisture and is more fragile than its fellow gemstones. It displays a brilliant array of colors which dazzle the eye.
1: When you are faced with stressful situations, cortisol, epinephrine, and norepinephrine are released by your. kidneys.
Photo Credit Jupiterimages/Photos.com/Getty Images. Cortisol is a stress hormone released by the adrenal glands during a fight-or-flight emergency situation. It is responsible for several functions in the body including blood pressure regulation, glucose utilization and anti-inflammatory properties.