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SECTION IV.— MINERALS,— Continued. 
Sub-Section IV,- — Rocks. 
Granite, coarse and fine-grained, with very little mica. Ireland, 
Do. white and porphyritic. Near Liskeard, Cornwall. 
Do. very coarse-grained. Aberdeenshire, Scotland. 
Do. with decomposed felspar yielding 
the kaolin of commerce. Near St. Austell, Cornwall. 
Gneiss, coarse-grained. 
Do. finer-grained. 
Mica-Slate enclosing stanvolite. 
Clay-Slate. 
Laminar Talc Slate. 
Hornblende Rock. 
Scotland. 
Lorn, Scotland. 
Mount Taganai, Urals. 
Cornwall. 
Scotland. 
Channel Islands. 
Serpentine, green with red veins, polished. The Lizard, Cornwall. 
Do. with diallage. 
Greenstone, fine-grained. 
Quartz Rock on Quartzite, fine-grained. 
Old Red Sandstone, micaceous. 
Micaceous Sandstone. 
Millstone Grit. 
Crystalline or Statuary Marble. 
Oolite or Roe-stone. 
Black Marble. 
Encrinital Marble. 
Porphyry with a little mica. 
Felstone Porphyry. 
Basalt including much olivine. 
Amygdaloid with analcime in the amygdules . 
Leucitic Lava. 
Scoriaceous Lava with sublimed micaceous iron ore. 
Obsidian of a reddish colour. 
Do. 
Derbyshire. 
Scotland. 
Derbyshire. 
Carrara, Italy. 
Near Bath. 
Derbyshire. 
Do. 
Italy. 
Scotland. 
The Rhine. 
Faroe Islands. 
Near Naples. 
Vesuvius. 
Hungary. 
Pumice. 
Conglomerate. 
Lipari Islands. 
Near Battle, Sussex. 
