Definition that contains orphic
- marble a hard crystalline metamorphic rock that takes a high polish; used for sculpture and as building material
- slate a fine-grained metamorphic rock that can be split into thin layers
- schist any metamorphic rock that can be split into thin layers
- pseudoephedrine poisonous crystalline alkaloid occurring with ephedrine and isomorphic with it
- quartzite hard metamorphic rock consisting essentially of interlocking quartz crystals
- chrysolite a brown or yellow-green olivine found in igneous and metamorphic rocks and used as a gemstone
- aragonite a mineral form of crystalline calcium carbonate; dimorphic with calcite
- biotite dark brown to black mica found in igneous and metamorphic rock
- hornstone a fine-grained metamorphic rock formed by the action of heat on clay rocks
- marlstone metamorphic rock with approximately the same composition as marl