Reigate Stone has a variety of different shades. It has generally been described as greenish grey, but it can be helpful to identify variations within this spectrum.
Variations can indicate different mineralogical content. This can be linked to physical properties such as hardness and cohesion, which in turn correlate with resistance to decay processes. Although mineralogical variations can be linked to provenance, research is limited and there are no definite indicators.
Variations in lightness can also indicate different moisture content, which can be linked to exposure and vulnerability to decay processes.
The selection of photos on this page groups Reigate Stone into three different colours. This can be helpful to make generalised assessments, when for example identifying different mineralogies, and distinguish between extremes, for example during repeat surveys in different weather conditions. These are not definitive categories and there will be variation within, and overlap between, separate groups.
