Jasper, an aggregate of microquartz and/or chalcedony and other mineral phases, is an opaque, mpure variety of silica, usually red, yellow, brown or green in color; and rarely blue. The common red color is due to iron 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 vases, seals, and snuff boxes.
Jasper is found almost everywhere and comes in almost every color.This necklace has a lobster clasp and is adjustable from 18 inches to 20 inches.