It is not common to say that Isabella's diamond ring is cursed. Usually, these stories are often fiction or legend. If you have heard the story of Isabella's diamond ring cursed, it may be based on a fictional plot, novel, movie or legend. Usually, the curse is imposed by some supernatural power, magic or evil entity, but such events are very rare in real life and usually only exist in fictional works.

If you have any specific questions about Isabella's diamond ring or other jewels, you can ask me, and I will try my best to provide information about the jewels. But the plot of diamond ring cursed is usually part of a fictional or mysterious story, which has nothing to do with diamonds and gems in the real world.