156. CAMPAN MARBLE.—Three kinds of marble are known by this name, all of them procured from immense quarries at Campan, near Bagnere, in the Pyrenees. The first, called _Green Campan_, is of pale sea─green colour, and exhibits, on its surface, lines of much deeper green, forming a kind of net─work. The second, called _Isabel Campan_, is of delicate rose colour, with undulating green veins. The third variety, the _Red Campan_, is of deep red colour, with veins of still deeper red. The green variegations in this stone are formed by a talcy mineral, intermixed with the lime─stone.—The Campan marble is well adapted for slabs, tables, chimney─pieces, and other ornamental purposes in the interior of buildings; but, if exposed to the weather, the talcose substances perish, and leave hollow spaces which render its surface rough and uneven. 157. GRIOTTE MARBLE _is of a deep brown colour, with blood─red oval spots, formed by shells_. Its name has been obtained from its brownish colour, being similar to that of the cherries that are called by the French _griotte_. This marble has, of late, been much used in the decoration of public monuments, and in splendid furniture, in France. Some of the ornaments of the Triumphal Arch of the Carousel are made of it. The department of Herault is the part of France from which it is obtained. It sometimes contains large white veins, which destroy the harmony of the other tints. 158. MARQUESE MARBLE.—This, which is obtained from quarries, near the village of Marquese, between Calais and Boulogne, is marked with _different shades and variegations of white and brown_. Of this marble Buonaparte commenced a magnificent column on the heights near the sea, at Boulogne, to commemorate his victories; but, since his dethronement, the erection of this structure has been discontinued. 159. SARENCOLIN MARBLE _is distinguished by exhibiting large zones, and angular spots of yellow or blood─red colour_. It is found at Sarencolin, in the High Pyrenees. 160. ST. BEAUME, or LANGUEDOC MARBLE, _is of light red colour, marked with white and grey zones, formed by madrepores_. The eight columns which adorn the Triumphal Arch, in the Carousel at Paris, are of this marble. It is obtained from quarries at St. Beaume, in the department of Aude. 161. BRECCIA MARBLE OF THE PYRENEES.—One kind of this marble contains black, grey, and red, middle─sized spots in a brownish red ground. It admits of a good polish. Another kind has an orange─yellow─coloured ground, containing small fragments of snow─white colour. Both these are found in the Pyrenees.