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quarry resources

Any common rock or other mineral substances as the Director of Mines and Geosciences Bureau may declare to be quarry resources such as, but not limited to, andesite, basalt, conglomerate, coral sand, diatomaceous earth, diorite, decorative stones, gabbro, granite, limestone, marble, marl, red burning clays for potteries and bricks, rhyolite, rock phosphate, sandstone, serpentine, shale, tuff, volcanic cinders, and volcanic glass: Provided, that such quarry resources do not contain metals or metallic constituents and/or other valuable minerals in economically workable quantities: Provided, further, That non-metallic minerals such as kaolin, feldspar, bull quartz, quartz or silica, sand and pebbles, bentonite, talc, asbestos, barite, gypsum, bauxite, magnesite, dolomite, mica, precious and semi-precious
stones, and other non-metallic minerals that may later be discovered and which the Director declares the same to be of economically workable quantities, shall not be classified under the category of quarry resources.