"The Jewelry" or the "False Gems" is a short story by Guy the Maupassant quite similar in the treatment of the theme of ambition as his other short story "The Necklace", with the difference that "The Jewerly" is told in third person omniscient from the perspective of the husband, Monsieur Lantin.
If we look at the problem of the story we can come up with a good the thesis statement: The main problem is that deceit is rampant in the story.M. Lantin is a man who seems to take everything at face value, and pays dearly for it in terms of his sentimental life. First, his wife Madame Lantin is a woman that, at first, is the perfect model of virtue and then changes radically into a jewelry lover and collector.
The young girl was a perfect type of the virtuous woman whom every sensible young man dreams of one day winning for life. Her simple beauty had the charm of angelic modesty, and the imperceptible smile which constantly hovered about her lips seemed to be the reflection of a pure and lovely soul. Her praises resounded on every side. People were never tired of saying: "Happy the man who wins her love! He could not find a better wife.
In addition to the deceit of Madame Lantin as a wife, there is also the deceit of the jewels which are thought to be fake. The jewelry that M. Lantin believes to be fake is actually real. The fact that the jewelry is real implies that the only way his deceased wife would have been able to obtain them is by having a lover. Moreover, this makes the marriage, itself, deceitful since there has been infidelity.
However, there is more to come: M. Lantin's deep grief for the loss of his wife is quickly healed by the selling of the jewels, which make him a rich man. Was the love between the Lantins as deeply-rooted as they made themselves believe during better times?
In the end, M. Lantin re-marries a woman whom he, again, judges to be completely different from the first Madame Lantin. He is wrong again. The second madame has a very bad temper and makes him quite unhappy. Poor M. Lantin has his final deception by making himself believe that a very virtuous woman would cause him less grief. He is wrong.
Hence, a good thesis statement would have to establish deceit as the causative factor of unhappiness. Sometimes the truths that we spend our life searching for are right in front of us. The lies of the Lantin marriage were ever-present in every day of the Lantin's married life. The lies that the Lantins told each other, and themselves, may have held their marriage for as long as it did until the wife's death. In not so many words, all we need to know about ourselves, and others, may very well be right in front of us. Let us never reduce a good observation into a bad assumption.