A very fine-grained dense rock consisting of chalcedony or opal, often with some quartz, and sometimes with calcite, iron oxide, […]

An even-textured, moderately highdensity wood of the eastern US, rich red-brown in color; takes a high luster; used for cabinetwork

A continuous gangway behind a rampart, providing a means of communication along a fortified wall.

A specially formulated paint finish which utilizes binders and pigments that are unaffected by chemicals.