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n. A bluish-gray sandstone used for paving and building.

n. A stone similar to this kind of sandstone.

n. A form of dolerite which appears blue when wet or freshly broken.

n. Any of several massive stones used to construct Stonehenge.

n. A feldspathic sandstone in the U.S.

n. A form of limestone native to the Shenandoah Valley

n. A basalt or olivine basalt.

n. Slate from quarries in or near Adelaide.

n. Blue vitriol.

n. A grayish blue building stone, as that commonly used in the eastern United States.

n. bluish-grey sandstone used for paving and building

"Destruction by poisoning is accomplished by inoculating the thick leaves with arsenic or bluestone, which is sprayed upon them after the plants have been hacked so that the poison may be absorbed by the sap, which distributes the deadly substance."

sandstone   

Stonehenge    sarsen   

off-saddled    house-sized    high-raised    fortress-like    saw-toothed