Relationship between stellar and dust mass (M_⊙) as both a function of morphological type and environment – Virgo (top) and Field (bottom). The dotted line is a fit to the Virgo and the dashed line a fit to the field data for morphological types Sc/Sd and Sm/Irr (the two lines sit on top of each other and so are difficult to distinguish). The red line corresponds to our calculated minimum value of log(M_Star/M_Dust) = 2.7.