Create a premium, sophisticated book cover for a business leadership book titled "Cicatrizes que Viram Diamantes" by Celso Toshio Saito. The cover has a dark, refined background with a subtle texture of cracked urban stone or concrete — representing the "selva de pedras" (stone jungle). The texture is elegant, not aggressive. From the lower-center of the cover, a deep crack in the stone reveals a warm, intense beam of golden light that erupts upward, cutting through the darkness. Near the origin of this light, a raw, uncut diamond is partially visible — half-emerging from the stone, still embedded, as if being "born" from the darkness. Only half of the diamond is revealed, creating mystery and curiosity. The title "Cicatrizes que Viram Diamantes" appears in the upper third in an elegant serif font with a refined gold foil effect — warm, not flashy. The subtitle "Como transformei dor em resultados na selva de pedras" appears below in clean white sans-serif, positioned near the light source. The author name "Celso Toshio Saito" is discreet at the very bottom in refined gold. The overall mood is sophisticated, dramatic, and mysterious — a serious business book that promises transformation. The cover must make the viewer curious about what created this light, compelling them to read the synopsis. Color palette: deep charcoal blacks, warm golden amber, refined stone grays. High contrast, cinematic lighting, premium editorial quality. 2:3 aspect ratio, photorealistic book mockup style.