Gemstone treatment
Fracture Filling, Diamond
Surface-reaching feathers show colored flash effects, often purple, orange, pink, or green when viewed at different angles. Filled fractures can look oily or slightly hazy.
01
What to look for
Surface-reaching feathers show colored flash effects, often purple, orange, pink, or green when viewed at different angles. Filled fractures can look oily or slightly hazy.
02
What it means
Fracture filling improves apparent clarity but is not permanent under heat, repair, or harsh cleaning. It must be disclosed.
03
Expert move
Use oblique illumination and tilt the diamond. A strong flash confined to a feather is the classic clue.