• Lapidary - a craftsman who polishes gemstones (other than diamonds).

  • Lapis Lazuli - a complex rock containing several minerals including calcite, hauynite (mainly responsible for the stone's color, lazurite, noselite, sodalite and flecks or iron pyrites.

  • Lazurite - an isomorphous combination of hauyite and sodalite present in lapis lazuli.

  • Lobster Claw Clasp - a clasp that looks just like what the name implies.  The lobster claw clasp is a very strong and very secure clasp.  They are used on chains, bracelets and anklets and are available in yellow, white and rose gold, platinum and silver.

  • Loupe - a jeweler's magnifying device used to view gemstones or their settings.  10x magnification is the industry standard.

  • Luster - the characteristic reflective property of a gemstone's surface.