Vintage Marked 750 18k Gold & Gem Quality Chrysoprase 4 Leaf Clover Pendant. From the top of the loop to the bottom of the clover stem it measures 35 mm. From side to side it measures 27 mm. Weight is 4.8 grams. This is the finest quality gem Chrysoprase. *The Chrysoprase is associated with the Astrological sign Gemini and is considered a very fortunate birth stone for Gemini. Like the Agate, it is a variety of quartz and takes its name from two Greek words meaning "golden leek," in reference to its color, which varies from an opaque yellowish green to a very light dirty white-green. The color has a tendency to fade from long exposure to the light and sun, but can be restored if the stone is dipped in a solution of nitrate of nickel. The finest specimens come from Silesia, and when the stone was in demand it used to be customary to close the mines for every two years out of three. According the Albertus Magnus, a Chrysoprase formed the Amulet of Alexander the Great, and Chrysoprase was much used by the ancient Greeks and Romans for signet rings and cameos; and also by the Egyptians, who set it with lapis lazuli. The virtues attributed to the Chrysoprase were that it imparted cheerfulness, making the heart glad by removing uneasiness, protecting its wearers from evil dreams and the assaults of demons. It also bestowed all kinds of blessings on its owner, giving assiduity in good works, and taking away all greedy and covetous desires, bringing success in new enterprises, and true and faithful friends: and it was also worn as an Amulet against rheumatism and gout. The Agates and Chrysoprase stones will not, however, be fortunate for those born during the time that the Sun occupies the Houses of Virgo and Pisces.