Does a divorce become effective if a husband made it contingent on selling his wife's gold within a month, and then the gold was sold before the end of that period, knowing that his intention was to use the money for a project, but he spent part of it on other matters and used the remainder for a different project?

If the gold belongs to the wife, it is not permissible to sell it except with her permission.

Regarding the oath of divorce concerning the sale of gold before a month, as long as it was sold before the month elapsed, the divorce does not occur. This is because a divorce conditional on a stipulation does not take effect if the stipulation is not met.

Spending the money for another purpose after selling the gold does not affect the ruling, because the oath was concerning the sale of the gold, not the use of the money for a specific project.