-
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.