Talk:Diamond enhancement

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[edit] Clarity enhancement

Treatments (and non-Treatments)

Laser Drilling (not required to disclose before 2001) - and interior acid washing of inclusions, sometimes filled with epoxy which can be damaged by repairing of the mounting when leaving the stone in place.
Fracture Filling - heating, cleaning, resetting, recutting, can break down the treatment, exposing the original flawed stone. Often easy to detect.
Yehuda (Clarity) Treatment - a fracture filling treatment that injects resin. Not readily detectable by most jewelers, and not often disclosed (prior to 2001, it still may not be, depending on the honesty/knowledge of your jeweler).

New FTC regs on treatments and disclosure to buyers

Statements where reasonable people may disagree

A treatment which has broken down is not something for which an insurer is liable.
- This depends on the insurance company, legal jurisdiction, and the fine print of the policy.

[edit] Color enhancement / worsening

Coating - cleaning, recutting may damage the coating
Irradiation - Greens may breakdown on heating (cleaning, remounting).
Pegasus color treatment (Monarch) - General Electric inscribes the girdle of their treated stones with GE-POL, but some people have attempted to polish these off. Currently makes colorless diamonds, but they're moving toward fancies. No independent verification on how durable the treatment is.
EGL/NovaDiamond color enhancement - uses pressure and temperature to make fancies. No independent verification on how durable the treatment is.
Beware of shipping items via mail, sometimes (US government, anthrax scare) irradiation is used, which can affect gems - most dramatically, cultured pearls, kunzite, and sapphire. Cumulative effects were also noted, even for the low level of irradiation used.

Dreseden Green Diamond, historical record to 1726, is being used to compare natural versus lab-produced irradiation in hopes of being able to devise a test to differentiat between the two.

statements that should have citations