Enhanced is a bit vauge…I prefer the more specific terms
myself. I believe everyone means fracture filled or laser
drilled and bleached diamnds. With fracture filled, a diamond
with a surface reaching fracture has a glass substance (such as
Opticon) forced into the fracture under pressure. It improves
the apparent clarity of the diamond, though the true clarity
remains what it was before. There is some disagreement about
how to “grade” these diamonds – some say it can’t be done. As
you may know, this glass leaks out under a jeweler’s torch.
Yehuda (sp?) co., which fracture fills, will repair all their
diamonds that are damaged this way for free.
Laser drilled diamonds – they take a diamond with a dark
inclusion, drill into it, insert a bleaching agent, and whamm-o,
you’ve got a light inclusion, and again the apparent clarity
has been enhanced.
Most people either sell 'em or don’t. I haven’t seen many
middle of the road policies. Lots of people are afraid of them.
Both treatments are very easy to detect with a microscope or
loupe. Once you’ve seen the “flash of color” of a fracture
filled diamond, you’ll never doubt yourself. It’s very clear.