The artist used a muted palette of browns and sombre greys. This choice of colour gives his work a quiet quality. He avoided the crowded arrangements common in larger Dutch still lifes. Instead, he placed a few objects on a simple stone ledge or wooden table. In "Stilleven met een schelvis en een knorhaan" (Still Life with Haddock and Gurnard) and "Dode vogels" (Dead Birds), he captures the textures of fish scales and damp skin. His brushwork is precise but remains visible upon close inspection. He focused on the weight of his subjects, often depicting birds with their wings or necks outstretched.

Modern collectors value the stark, graphic quality of Vonck's compositions. His paintings feel less like decorative ornaments and more like honest observations of nature. The neutral tones make his prints suitable for contemporary interiors that favour minimalism. His work provides a connection to the Dutch Golden Age without the visual clutter of more ornate floral pieces. These prints offer a sense of stillness. They appeal to those who appreciate the technical skill required to render organic forms with accuracy.