Gem of all joy, jasper of jocundity!
One might suspect Dunbar of bringing in the jasper to chime with the jocundity, were it not more likely that he brought in the jocundity to chime with the jasper!
Jet
This stone, which gives its name to its color, a shiny dark black, might be called kissing kin to the diamond. It is a kind of lignite, one of the forms of pure carbon, differing from coal and diamond only in the arrangement of the molecules. It is an intense black in color but very soft.
The name jet is from the Greek gagates, which indicates that it comes from Gagas, a town and a river of Lycia in Asia Minor. Jet, however, was known also to the ancient Celts, who carved it.
Although its color has made it popular mainly for religious and especially (in the western world) for mourning motifs, jet has a bright glow upon its black that can be effective in earclips and other jewel forms.
Kunzite
Named for the American gem expert George F. Kunz (1856—1932), kunzite is a stone of attractive lilac crystals. It is a transparent variety of spodumene which is a crystalline mineral, lithium aluminum silicate, chemically Li Al (Si O₃)₂. Spodumene is usually yellow or light green; in its more delicate shadings, used for ornament, it is now called kunzite.
Lapis Lazuli
Known from earliest times, and in high repute as an ornamental stone, lapis lazuli is a mixture of various minerals. It is azure blue and opaque, usually with tiny golden flecks. The name means the azure stone.