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SUNSTONE , a See also:felspar exhibiting in certain directions a brilliant spangled See also:appearance, which has led to its use as an ornamental See also:- STONE
- STONE (0. Eng. shin; the word is common to Teutonic languages, cf. Ger. Stein, Du. steen, Dan. and Swed. sten; the root is also seen in Gr. aria, pebble)
- STONE, CHARLES POMEROY (1824-1887)
- STONE, EDWARD JAMES (1831-1897)
- STONE, FRANK (1800-1859)
- STONE, GEORGE (1708—1764)
- STONE, LUCY [BLACKWELL] (1818-1893)
- STONE, MARCUS (184o— )
- STONE, NICHOLAS (1586-1647)
stone. The effect appears to be due to reflections from enclosures of red See also:haematite, in the See also:form of See also:minute scales, which are hexagonal, rhombic or irregular in shape, and are disposed parallel to the See also:principal cleavage-See also:plane. These enclosures give the stone an appearance something like that of See also:aventurine (q.v.), whence sunstone is known also as " aventurine-felspar.” It is not See also:common, the best-known locality being Tvedestrand, near See also:Arendal, in See also:south See also:Norway, where masses of the sunstone occur embedded in a vein of See also:quartz See also:running through See also:gneiss. It is found also near See also:Lake See also:Baikal, in See also:Siberia, and at several localities in the See also:United States, notably at See also:Middletown, See also:Delaware See also:county, Eennsylvania, and at Statesville in See also:North Carolina. The felspar which usually displays the aventurine appearance is See also:oligoclase (q.v.), but the effect is sometimes seen also in See also:orthoclase (q.v.): hence two kinds of sunstone are distinguished as " oligoclase sunstone " and " orthoclase sunstone." The latter has been found near Crownpoint and at several other localities in the See also:state of New See also:York, as also at Glen Riddle in Delaware county, See also:Pennsylvania, and at Amelia See also:Court See also:House, Amelia county, See also:Virginia.
End of Article: SUNSTONE
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