Aquamarine'scool blue hues are reflected in its name,which comes from the Latin for "sea water."Medieval sages prescribed water touched by aquamarine for a host of ills including those affecting the eyes and lungs. They promised the virtues of insight and foresight to the ' gem's wearers. Aquaarine crystals can grow to huge sizes,and usually blessed with excellenl clarity. Gem bodycolors range from greenish blue to blue-green in light tones. Usually,the color is more intense in larger stones,but some aquamarine frome Africa displays deeper blues in faceted stones of less than 5 cts. Brazil supplies the most aquamarine to the modern market.Like emerald,aquamarine is a member of the beryl species. The gem is March' birthshstone.