Decorative "stone" found on cap and/or barrel ends of some pens. These are usually plastic and are sometimes made of metal. Does not refer to an actual precious or semiprecious gem."

while the first ballpoints were introduced in the mid '40s, the Parker Jotter, introduced in 1954, was the first widespread success. In 1957, a tungsten point was developed called the "T-Ball Jotter." Parker's ballpoint refills of today still fit these early pens."