What is "silicious"

Usage examples of "silicious".

Varnished Faiences -- Enamelled Faiences -- Silicious Faiences -- Pipeclay Faiences -- Pebble Work -- Feldspathic Faiences -- Composition, Processes of Manufacture and General Arrangements of Faience Potteries -- Stoneware.

These kames and sand plains, because of the silicious nature of their materials and the very porous nature of the soil which they afford, are commonly sterile, or at most render a profit to the tiller by dint of exceeding care.

Headley, that the groundwork here, so far as we can observe it through the dense growth of hydrozoa and silicious sponges, is pumicestone and the black slag of basalt, pointing to ancient plutonic activities.