A square, 1024x1024, professional audiobook cover artwork. The style should evoke 17th-century European historical fiction with a touch of mystery and adventure. The central image is a single, ornate, crimson velvet gorget, slightly tarnished and worn, hinting at past battles. It is cast in dramatic chiaroscuro lighting, with deep shadows obscuring the background, suggesting intrigue and hidden depths. The velvet texture should be rich and palpable. Subtle hints of metallic glint from clasps or embroidered details could be present, but the focus remains on the tactile quality of the velvet. The overall mood is somber, sophisticated, and hinting at danger. The color palette is dominated by deep reds, blacks, and muted golds or silvers for metallic accents, creating a sense of historical richness and gravitas. No text, no letters, no words, no title, no author name.