Jasper Jasper Jasper, an aggregate of microgranular quartz and/or chalcedony and other mineral phases, is an opaque, impure variety of silica, usually red, yellow, brown or green in color; and rarely blue. The common red color is due to iron(III) inclusions. The mineral aggregate breaks with a smooth surface and is used for ornamentation or as a gemstone. It can be highly polished and is used for items such as vases, seals, and snuff boxes. The specific gravity of jasper is typically 2.5 to 2.9. A green variety with red spots, known as heliotrope (bloodstone), is one of the traditional birthstones
Heliotrope (color) a colour name in English was in 1926. Heliotrope (color) Heliotrope is a pink-purple tint that is a representation of the colour of the heliotrope flower. The first recorded use of heliotrope as a color name in English was in 1882. The color heliotrope gray is displayed at right. The first recorded use of "heliotrope gray" as a colour name in English was in 1912. The source of this colour is: "ISCC-NBS Dictionary of Colour Names" (1955)--Colour Sample of Heliotrope Gray (color sample #227) At right is displayed the colour old heliotrope. Another name for this colour is "old helio".