Aloysio Raulino, a Brazilian director recognized for his poignant storytelling, made significant strides in the world of documentary filmmaking. His 1975 film, *Cristais de Sangue*, stands out as a critical exploration of social issues in São Paulo, capturing the stark realities of poverty and despair that resonate deeply with audiences and collectors alike. This film not only showcases Raulino's keen eye for detail but also his commitment to shedding light on the lives of the marginalized. Collectors actively seek out Raulino’s work due to its historical significance and the raw, unfiltered portrayal of Brazilian society during a tumultuous period. His films, especially *Cristais de Sangue*, are prized for their authenticity and emotional depth, making them essential additions to any serious collection of Brazilian cinema. Raulino's legacy continues to inspire appreciation for documentary filmmaking as a powerful medium to reflect societal truths.