Fig. 7: A BRP with the partially preserved fine-grained structure of the original raw material—limestone.
From: Baroque stucco techniques of Baldassarre Fontana at Kroměříž Château

Sample STK 2, PPL (upper half), XPL (lower half) (A). Distinctive sharp-angled fragments of coarse crystalline marble in a fine-grained calcitic matrix with BRPs. Sample STK 12, XPL (B). A finely crystalline limestone particle (center) with quartz grains in matrix, a possible relict of thermal disturbance. Sample STK 2, PPL (C). Stucco mortar with siliciclastic aggregates and crushed marble as a minor component. Sample STK 8, XPL (D).