The story is arranged like this: it satirizes the unfaithfulness in marriage, the wife's unskilled love and cheating on her husband (the lover bought her a lot of jewelry, and she lied to her husband that it was fake and cheap, and as a result, he was hit hard when he learned the truth after her death and squandered it to vent his troubles and dissatisfaction), and the originally extremely happy marriage turned into an ugly scam.
The jewelry is actually real, but the husband doesn't know that after his wife died, he didn't appreciate her pains and didn't cherish it, but squandered it at once, with a tragic ending and a bad human nature.
Jewellery is an excellent realistic novel. The novel's objective and true description and meaningful satire not only reflect the social outlook of France in the second half of the19th century from one side.