Glossary & Picture Library, learn

  • World Federation of Diamond Bourses
  • Yellow Diamond
    Yellow Diamond A coloured diamond with a natural yellow body colour.
  • Upper-Girdle Facet
  • Wavy Girdle
    Wavy Girdle Girdle that is uneven in thickness and/or does not follow a straight plane around a diamond
  • Trilliant
    Diamond cut or shaped into a triangle, sometimes with curved sides.
  • Twinning Line
  • Transparency
  • Treated Diamond
    Treated Diamond Diamonds that are artificially enhanced, to improve either colour or clarity
  • Trigon
  • Toughness
    Toughness Measure of brittleness, or resistance to fracture and breaking