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2. Prehistoric Rock Art Sites in the Côa Valley and Siega Verde

   en.wikipedia.org/wiki/Prehistoric_Rock_Art_Sites...

   Carvings of various zoomorphic creatures, including in particular, a horse Paleolithic rock engravings breaking the natural rock formation Various zoomorphic and anthropomorphic designs on granite slabs. The earliest drawings appearing in the Côa Valley date between 22 and 20 thousand years B.C., consisting of zoomorphic imagery of nature. [4]

3. List of decorative stones - Wikipedia

   en.wikipedia.org/wiki/List_of_decorative_stones

   The granite of the dimension-stone industry along with truly granitic rock also includes gneiss, gabbro, anorthosite and even some sedimentary rocks. Natural stone is used as architectural stone (construction, flooring, cladding, counter tops, curbing, etc.) and as raw block and monument stone for the funerary trade.

4. Porphyry (geology) - Wikipedia

   en.wikipedia.org/wiki/Porphyry_(geology)

   "Imperial Porphyry" from the Red Sea Mountains of Egypt A waterworn cobble of porphyry Rhyolite porphyry from Colorado; scale bar in lower left is 1 cm (0.39 in). Porphyry (/ ˈ p ɔːr f ə r i / POR-fə-ree) is any of various granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate-rich, generally aphanitic matrix or groundmass.

5. Granite - Wikipedia

   en.wikipedia.org/wiki/Granite

   Granite (/ ˈ ɡ r æ n ɪ t / GRAN-it) is a coarse-grained intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase.It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies underground.

6. List of quarries in the United States - Wikipedia

   en.wikipedia.org/wiki/List_of_quarries_in_the...

   W.N. Flynt Granite Co., in Monson, Massachusetts, a granite quarry that opened in 1809 and operated until 1935. By 1888, the company employed over 200 workers, and produced about 30,000 tons of granite per year. Quincy Quarries Reservation, in Quincy, Massachusetts, producer of granite from 1826 to 1963, including for the Bunker Hill Monument.

7. Your Guide to the Real Cost of Granite Countertops - AOL

   www.aol.com/lifestyle/guide-real-cost-granite...

   Most slabs of granite countertops for a kitchen are one and 1/4 inches and in the bathroom a little shallower at 3/4 of an inch. The cost will also increase based on the number of cut-outs for the ...