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
Shades of red purple. The color "rusty red" is displayed at right. "Rusty red" is a color formulated by Crayola in 1990 as one of the colors in its Silver Swirls specialty box of metallic colors. It is a metallic color. "Fire engine red" is an intense, bright red commonly used on emergency vehicles; mostly on fire engines, other associated fire service vehicles, and ambulances. "Cardinal red", also called "cardinal", is a vivid red, which gets its name from the cassocks worn by cardinals. The family of birds takes its name from the color. "Chili red" is the color of red chili peppers.