A bar trinity diamond ring in a tension mount photographed at Diamond Design in St. John's, Newfoundland.
Scintillation: The small areas of light in a polished diamond that flash
on and off as the diamond, observer or lighting moves.
Pattern: The arrangement of light and dark areas that result from internal and external reflections.
Contrast: The relief of light and dark areas that creates the face-up pattern of a diamond.
