Most Total Time Spent in Space. Soviet cosmonaut Sergei Krikalev holds this record, with a little more than 803 days accrued over six spaceflights. That's more than two years and two months spent zipping around the Earth.
Natural citrines are rare. Most commercial citrine is heat-treated amethyst or smoky quartz. Because the color is now caused by finely distributed iron minerals (mostly hematite and goethite), heated amethyst is not a citrine in the strict sense.Quartz colored by inclusions of any kind is not called a citrine.atural citrines are rare. Most commercial citrine is heat-treated amethyst or smoky quartz. Because the color is now caused by finely distributed iron minerals (mostly hematite and goethite), heated amethyst is not a citrine in the strict sense. Quartz colored by inclusions of any kind is not called a citrine.
In antiquity, Citrine may have been mistakenly referred to as Topaz, and may well have been used in many ancient cultures. In one text it is referenced as Cairngorm, a false topaz, being of a light yellow or citron color [Fernie, 179] ; and as a Scotch Topaz, being only a yellow quartz.atural Citrine is beneficial in eliminating infections of the kidney and bladder, and in the treatment of bed wetting, particularly in young adults. As an elixir, Citrine relieves menstrual and menopausal symptoms, such as hot flashes, hormone imbalance and the alleviation of fatigue.