The vast majority of unsigned paintings are likely to be by minor or amateur artists. They may be attractive works of art, but without an identifiable signature or a clear provenance, their value is purely that of a decorative item. If your artwork has clear indicators of potential value, it may be worth seeking the advice of an art dealer or a saleroom. Good quality, heavy frames are usually found on better quality artworks. Framing labels on the reverse are also a good sign, as many professional artists have their works professionally framed.