For me this is the worst part of the migraine. Sure the headache is terribleâ¦but the post period (postdrome)â¦agh! Usually, a 36 to 48 hr period of comeplete listlessness and nausea. I feel like I had a lobotomy and my head is a empty vesselâ¦Nicholsonâs character at the end of One Flew Overâ¦ comes to mind.
Alexandrite, a strongly pleochroic (trichroic) gem, will exhibit emerald green, red and orange-yellow colors depending on viewing direction in partially polarised light. However, its most distinctive property is that it also changes color in artificial (tungsten/halogen) light compared to daylight.tones that show a dramatic color change and strong colors (e.g. red-to-green) are rare and sought-after, but stones that show less distinct colors (e.g. yellowish green changing to brownish yellow) may also be considered alexandrite by gem labs such as the Gemological Institute of America.
Alexandrite Color Alexandrite's green hue is a result of chromium impurities. Chromium is the same coloring element found in emerald, the green variety of precious beryl. Sri Lanka (Ceylon) alexandrite is known to exhibit a khaki to brown color change.hrysoberyl Cat's Eye. Alexandrite is a rare color change and chromium-bearing variety of chrysoberyl. There are a few other chrysoberyl varieties available; most are categorized because of an optical property, such as color, color change effect and chatoyancy.