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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. Unakite - Wikipedia

   en.wikipedia.org/wiki/Unakite

   The dominant green epidote in unakite rocks is the metasomatic alteration product of plagioclase feldspar, while the orthoclase and quartz crystals remain unaffected. Distribution [ edit ]

5. 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.

6. 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.

7. Stones of India - Wikipedia

   en.wikipedia.org/wiki/Stones_of_India

   Indian Green Marble: It is found in Rajasthan, India; Indian Green Marble's most quarries are situated in Kesariyaji, which is 60 km far from Udaipur, Rajasthan India. This Indian green marble is known by name all over the world. In Europe, people know Indian green marble as a Verde Guatemala. Many varieties are available in Indian green marble.