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.
During fight or flight, the adrenal gland releases cortisol, a corticosteroid hormone. In situations in which your body perceives the stress as a severe threat or the stress is prolonged, an excess level of cortisol becomes active in your brain. Too much cortisol can have negative effects on your hippocampus.