Lemon chrysoprase beads are also known as citron beads and lemon magnesite beads. These semiprecious gems offer a lighter yellow-green hue than true chrysoprase, and are actually a form of magnesite with brown to light-tan veining. The distinction between chrysoprase (a valuable, opalescent green chalcedony quartz) and lemon chrysoprase might simply be the amount of the underlying mineral (quartz vs. magnesite). For a while, our lemon chrysoprase was nicer than most on the market, but now the greenest, best-quality variety is nearly impossible to find.