The many faces of Reigate Stone: an assessment of variability in historic masonry based on Medieval London’s principal freestone

Heritage Science

Table 3 Correlation matrix using Pearson’s method on results shown in Table 3

	Quartz	Opal CT	Feldspar	Calcite	Clays	Bulk density	Open porosity	Pulse velocity	Capillary absorption	Sorptivity	Hysteresis
Quartz	1
Opal CT	− 0.34	1
Feldspar	− 0.21	− 0.49	1
Calcite	− 0.21	0.58	− 0.23	1
Clays	− *0.65*	− 0.06	− 0.12	− 0.42	1
Bulk density	− 0.40	0.18	0.24	0.59	− 0.14	1
Open porosity	0.17	− 0.19	− 0.12	− *0.65*	0.35	− 0.57	1
Pulse velocity	− 0.46	0.48	0.05	*0.75*	− 0.16	0.55	− *0.72*	1
Capillary absorption	0.31	− 0.26	0.03	− *0.60*	0.09	− *0.62*	0.55	− *0.82*	1
Sorptivity	− 0.45	0.17	− 0.02	0.02	0.43	− 0.24	0.24	0.26	− 0.24	1
Hysteresis	− 0.23	0.31	− 0.04	− 0.21	0.28	− 0.35	0.37	0.14	− 0.08	*0.64*	1

Mineralogical correlations made using all 33 samples. Mineralogical-physical and physical correlations made using 26 samples for which this data was available. R greater than 0.4 (or less than − 0.4) marked in italic. R greater than 0.6 (or less than − 0.6) marked in bold-italic