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Carrara marble, or Luna marble ( marmor lunense) to the Romans, is a type of white or blue-grey marble popular for use in sculpture and building decor. It has been quarried since Roman times in the mountains just outside the city of Carrara in the province of Massa and Carrara in the Lunigiana, the northernmost tip of modern-day Tuscany, Italy.
Cataclasite is a cohesive granular fault rock. [ 1] Comminution, also known as cataclasis, is an important process in forming cataclasites. [ 2] They fall into the category of cataclastic rocks which are formed through faulting or fracturing in the upper crust. [ 3] Cataclasites are distinguished from fault gouge, which is incohesive, and fault ...
Quartz is a hard, crystalline mineral composed of silica ( silicon dioxide ). The atoms are linked in a continuous framework of SiO 4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO 2. Quartz is, therefore, classified structurally as a framework silicate mineral and ...
Itacolumite is a naturally occurring sandstone that is flexible when cut into relatively thin slabs. It occurs at Itacolomi, its eponym, in the southern portion of Minas Gerais, Brazil. The stone is porous, and often yellow in color. It is also found in Kaliana village ( Charkhi Dadri district, Haryana, India), [ 1] the US state of Georgia, and ...
Herkimer diamonds are double-terminated quartz crystals discovered within exposed outcrops of dolomite in and around Herkimer County, New York, and the Mohawk River Valley in the US. [ 1][ 2] They are not diamonds; the "diamond" in their name is due to both their clarity and well formed faces. Because the first discovery sites were in the ...
Calcata (locally Cargata) is a comune and town in the Province of Viterbo in the Italian region Lazio, located 47 kilometres (29 mi) north of Rome by car, overlooking the valley of Treja [ it] river. Calcata borders the following municipalities: Faleria, Magliano Romano, Mazzano Romano, Rignano Flaminio . In the 1930s, the hill town's fortified ...
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