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lcite, barite, and feldspar, which emit a fetid odor on being struck; -- called also swinestone.

A stumbling-block. This stumbling-stone we hope to take away. T. Burnet.

Aventurine feldspar. See under Aventurine.

See Stinkstone.

A silver coin of Portugal, worth about sixpence sterling, or about eleven cents. Homans.

A thunderbolt, -- formerly believed to be a stone. Fear no more the lightning flash, Nor the all-dreaded thunderstone. Shak.

A kind of laminated shale or sandstone belonging to some of the layers of the Upper Silurian.

Cassiterite.

yshire, England; -- said by some to be derived from the German todter stein, meaning dead stone, that is, stone which contains no ores.

A stone erected over a grave, to preserve the memory of the deceased.

A stone that is placed on the top, or which forms the top.

Lydian stone; basanite; -- so called because used to test the purity of gold and silver by the streak which is left upon the stone when it is rubbed by the metal. See Basanite.

A variety of anhydrite composed of contorted plates fancied to resemble pieces of tripe.

n species (Strepsilas interpres). They are so called from their habit of turning up small stones in search of mollusks and other aquatic animals. Called also brant bird, sand runner, sea quail, sea lark, sparkback, and skirlcrake. Black turnstone, the California turnstone (Arenaria melanocephala). The adult in summer i…

The nonmetalliferous mineral or rock material which accompanies the ores in a vein, as quartz, calcite, barite, fluor spar, etc.; -- called also veinstuff.

See under Bridge.

brating the corresponding Lissajous figure. So called because devised by Sir Charles Wheatstone.

A piece of stone, natural or artificial, used for whetting, or sharpening, edge tools. The dullness of the fools is the whetstone of the wits. Shak. Diligence is to the understanding as the whetstone to the razor. South.

A provincial name given in England to basaltic rocks, and applied by miners to other kind of dark-colored unstratified rocks which resist the point of the pick. -- for example, to masses of chert. Whin-dikes, and whin-sills, are names sometimes given to veins or beds of basalt.

A striped variety of hornstone, resembling wood in appearance.