Glossary of the Gemtrade

Hence grading is to be differentiated from ;certification; in which a 3rd party testifies only the stones quantifiable features or a financial replica watches ;appraisal;.Grown: Grown is a term often used by fraudulent sellers to skip around the fact that their gem is synthetic and, therefore, worthless.Hunting: Search for an individual gemstone based on a buyer specification of size, color, cut etc.Hypnotic: Term used for the very best colors. Such a hue will imprint itself into your memory and will never be forgotten. It is quite a compliment for any gem. Imitations: Anything pretending to be a gem without being one.In the color: Sales term to describe the quality of a color as being best in that hue. Subjective judgment.Inclusion: Anything that hinders light falling through and out of the stone. Some inclusions are desired (horsetails, needles, silk) others not (cracks). Some can be very aesthetic (water lily) others are not (dirt).Also called ;Black-out;. Face: The upper dimensions of a stone which is visible after being set in jewelry. Sometimes also referred to as table. The face is the most important feature to look at when judging a gemstone size for jewelry. Faceting: Cutting and polishing a rough gemstone. Fish-eye: Term for a gemstone with a big ;window;. For diamonds the term is also used when a pavilion is cut too shallow, allowing the girdle reflection to show through the crown.Fluorescence: Though scientifically not correct, the term is use to describe a gem (especially a rubies) capabilities to glow on its own. In fact, the stone re-emits ultraviolet light.Gemologist: Anybody knowing enough about gems. No protected profession. Grading: Process of evaluation by a ;gemologist;, in particular the owner of the stone and thus including subjective non-qualitative characterization and overall rankings.