This paper presents an investigation of the effects of the properties of reconstituted granular soils on the relationship between CPT cone resistance (qc) and relative density (Dr). The results from a large number of calibration chamber tests conducted at a number of stress levels and involving soils with various shapes, compressibilities and mineralogies are presented. The paper also provides data recorded in a parallel series of investigations into the mechanical properties of the granular soils employed in the chamber tests. It is shown that there is a strong influence of the nature of granular deposits on qc vs Dr relationships and that there is a near linear relationship between the cone resistance and the critical state friction angle for sands reconstituted at a given Dr and stress level.