JASPER GemShoppy April 18, 2015 Gemstones It is called the “Talisman Stone” because it was used for diagnosis. It gives a sense of balance to spirit. Grounds you physically and emotionally. Available in several colors :- (1) Green: Balancing, (2) Yellow: Confidence. Jasper brings joy into life. Jasper exhibits various colours, but chiefly brick red to brownish red. It owes its colour to admixed hematite, but when it occurs with clay admixed, the colour is a yellowish white or grey, or with goethite, a brown or yellow. Often jasper is multi-colored. SiO2 Jasper is opaque, fine-grained or dense variety of the silica mineral chert. Jasper, long used for jewelry & ornamentation, has a dull luster but takes a fine polish. Its hardness and other physical properties are those of quartz. The name jasper is from the Greek iaspis. Care and treatment: The polish on jasper will often be washed away in water. Clean your jasper jewellery with a soft dry cloth. In ancient writings the term jasper was chiefly applied to translucent and brightly colored stones, particularly chalcedony, but also was applied to the opaque jasper. Jasper was known as the great “rain-bringer” in the fourth century. For thousands of years, black jasper was used to test gold-silver alloys for their gold content. Rubbing the alloys on the stone, called a touchstone, produces a streak the colour of which determines the gold content within one part in one hundred. Jasper is one of the gemstones, that used in commesso, also called Florentine mosaic. Commesso is a technique of fashioning pictures with thin, cut-to-shape pieces of brightly colored, semiprecious stones, developed in Florence in the late 16th century.