Signet Jewelers (SIG -1.19%) stock wasn't exactly a jewel of an investment as 2024 bowed out. The specialty retailer's share price eroded by almost 20% in December, which, as it covers the holiday period, often proves to be a boon for the sector. But investors were discouraged by the company's latest set of quarterly earnings, and a subsequent price target cut from an analyst only highlighted the disappointment.A lack of lusterSignet, a tightly focused conglomerate that owns the Zales, Kay, and Jared brands ...