• Laser Drilling

    Treatment to enhance the apparent clarity of a diamond by reducing the visibility of dark inclusions. A precise laser beam drills a small tunnel from the surface of the diamond to the dark inclusion; the black in the inclusion either dissipates from the laser beam itself, or else it is bleached out with acid. Click here to learn more about laser drilling and clarity enhancement.

  • Life

    Liveliness and beauty seen in a particular diamond, taking into consideration the amount and quality of brilliance, dispersion, and scintillation.

  • Loose Diamond

    Diamond that is not mounted in jewellery. Diamond certification is not possible when the diamond is set in jewellery, as none of the four c’s can be accurately assessed – only estimates are achievable.

  • Loupe

    Hand held magnifying lens. Diamond clarity must be graded with a 10x loupe that is corrected for spherical and chromatic aberration.

  • Lower-Girdle Facets

    Triangle shaped facets adjacent to the girdle on the pavilion.