Goldor is a magic spell used by witches in Professor Layton vs. Phoenix Wright: Ace Attorney. The spell is used to turn something (or someone) into pure gold. The magic gem for the Talea Magica is a golden pyramid.
The spell Goldor was first used roughly five years before the events of the game, when Jean Greyerl tried to save her family from bankruptcy. However, she accidentally turned her goat into gold and got depressed over it.
Later it was used again by a witch before the second Witch Trial in order to turn Professor Layton into gold.
However later on in the game it is revealed that the Shades created a gold statue of the victim, rang the pure silver bell to render him/her unconscious, and placed the statue in the victim's place.