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262 QUAR1Z FAMILY, Geographic Situation. Europe.—It occurs in the Pentland Hills, and Moor- foot Hills, near Edinburgh; and in different places along the course of the rivers Tweed and Clyde, where it is con tained in transition rocks. It occurs in trap rocks and transition rocks in Ayrshire and Dumfriesshire. To the north of the Frith of Forth it is not unfrequent, both in the form of veins and imbedded portions. In the fine display of rocks described by Colonel Imrie as occurring in the course of the North Esk river in the Mearns, there are cotemppraneous masses and veins of jasper in transi tion rocks. It occurs also in the Zetland Islands, and in several of the Hebrides. On the Continent of Europe it has been observed in Sweden, Russia, Germany, Ilun- gary, Transylvania, France, Italy, Spain, Portugal; and in the islands of the Mediterranean, particularly Sicily. Asia.—It is found in great abundance in Siberia. Uses. M hen it occurs in sufficiently large masses, and receives a good polish, it is cut into various ornamental articles, as vases, snuff-boxes, ringstones, &c. The finest varie ties are used for engraving on: many beautiful antique engraved stones of common jasper are preserved in collec tions. Observations. 1. Colour, lustre, fracture, and geognostic situation combined, distinguish this subspecies of jasper from the others. 2. It passes into Iron-ffint and into Clay-Ironstone, and is nearly allied to Hornstone and Claystone. 3. The
