Almost every emerald is oiled — new buyers fear it needlessly, as long as it is disclosed.
What it is — oil or resin fills microfractures to reduce their visibility; a centuries-old, accepted practice. ## Normal vs deception — normal if stated in the report; deception if hidden to inflate price. ## Care — no ultrasonic or steam cleaning, no hot water; wipe gently. Oil can be refreshed by a jeweller.
Frequently asked questions
Is oiling an emerald bad?+
No — it is standard practice; it just must be disclosed.