Musical Diamond
A crystal with a stress halo and a smaller adjacent crystal resembles a dotted quarter note. Several reflections of such crystals with stress fractures are visible. Photomicrograph by Michaela Damba; field of view 2.90 mm.
Recently the author examined a 0.95 ct diamond with a special note. It only took one and a half beats to discover a dark crystal with a straight stress cleavage crack shaped like a dotted quarter note (see above).
Crystals, cleavages, and other inclusions are common occurrences that impact a diamond’s clarity grade. This diamond received a clarity grade of SI1, or slightly included with inclusions noticeable to a skilled grader at 10× magnification.
