Fig. 9From: Petrographic and geochemical analyses to characterise the source of built historical natural stones — a case study of the volcanic stones from historical quarries and Baoguosi Temple in the city of Ningbo, ChinaMicrophotographs of thin sections by polarised light microscope (all images were taken with crossed Nicols): (a) M201809-1; (b) M201809-2; (c) M201809-3; (d) BGS; (e) X201809-1; (f) X201809-2; (g) D201809-1; (h) D201809-2 (Source: the authors)Back to article page