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.
Picasso Jasper is known for it's streaks of bold colors for an abstract look reminiscent of the late painter, Picasso.
This necklace has a lobster clasp and is adjustable from 19 inches to 21 inches.