Sandstone fragments with alveolar deterioration
Samples for removing paint a) on limestone made by Kerry Johnson; b) samples on on wood for removing paint layers made by CSMyers; plaster substrate and wood substrate for removing samples.
Sandstone fragments and analysis samples for Bethesda Terrace
Fragment of a gravemarker with tooling marks
12 sandstone coupons with grouting
Sandstone fragment of an Ionic volute with gypsum crust
Microsamples and salt tests from Dakota Sandstone
Fragments of limestone of unknown origin
9 limestone fragments of unknown origins.
Cubes and disks of marble, limestone, and granite