Trial and Punishment of the Necklace Thieves

In 1785, Cardinal de Rohan was arrested for his involvement in a scandal involving a fake Marie Antoinette. Despite being acquitted of treason, the trial damaged the Queen's reputation. Public rumors falsely implicated her as the mastermind. Jean, the true plotter, was sentenced but later escaped to London. The scandal left a lasting impact on Marie Antoinette's image.

What were the consequences faced by Jean for her involvement in the plot?

How did the public perception of Marie Antoinette change despite her being found innocent?

What ultimately happened to the necklace involved in the scandal?