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.
Under normal conditions, your brain slowly releases cortisol into your body to make your muscles work. However, if you're highly stressed (late for work, deadline due, screaming baby: take your pick), your brain thinks there's an emergency and responds by flooding your body with cortisol.