A variety of Quartz is spangled with bright particles of Mica and Haematite. The most common colour is green, but other colours such as blue, red or yellow are found. Aventurine was named in 1811 from the French adventure, meaning chanceù. Aventurine is said to aid in the release of anxieties and fears, promoting emotional tranquillity and positive attitudes towards life. It is also thought to enhance leadership qualities and reinforce decisiveness. It is considered to be helpful in treating disorders of the heart, lungs, adrenal glands and muscular and urogenital systems. It has also been useful in the treatment of eyesight and hair problems.