Diaphaneity Art Deco Transparent Emerald and Diamond Ring. Translucent Star Sapphire and Diamond Ring. Edwardian Opaque Turquoise and Diamond Pendant. Diaphaneity is the general term to describe the transmittance of light through an object. The three typical classifications are transparency, translucency, and opacity. Art Deco Transparent Emerald and Diamond Ring. Translucent Star Sapphire and Diamond Ring. Edwardian Opaque Turquoise and Diamond Pendant.