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Marble is a metamorphic rock consisting of carbonate minerals (most commonly calcite (CaCO 3) or dolomite (CaMg (CO 3) 2) that have recrystallized under the influence of heat and pressure. [1] It has a crystalline texture, and is typically not foliated (layered), although there are exceptions. In geology, the term marble refers to metamorphosed ...
The materials commonly used are marble or other stone, glass, pottery, mirror or foil-backed glass, or shells. The word mosaic is from the Italian mosaico deriving from the Latin mosaicus and ultimately from the Greek mouseios meaning belonging to the Muses, hence artistic. Each piece of material is a tessera (plural: tesserae).
It is found as either a stalagmitic deposit from the floor and walls of limestone caverns, or as a kind of travertine, similarly deposited in springs of calcareous water. Its deposition in successive layers gives rise to the banded appearance that the marble often shows on cross-section, from which its name is derived: onyx-marble or alabaster ...
Main jade producing countries. Jade is an umbrella term for two different types of decorative rocks used for jewelry or ornaments.Jade is often referred to by either of two different silicate mineral names: nephrite (a silicate of calcium and magnesium in the amphibole group of minerals), or jadeite (a silicate of sodium and aluminum in the pyroxene group of minerals). [1]
Lapis lazuli is found in limestone in the Kokcha River valley of Badakhshan province in north-eastern Afghanistan, where the Sar-i Sang mine deposits have been worked for more than 6,000 years. [20] Afghanistan was the source of lapis for the ancient Persian, Egyptian and Mesopotamian civilizations, as well as the later Greeks and Romans.
Many words of Persian origin have made their way into the English language through different, often circuitous, routes. Some of them, such as " paradise ", date to cultural contacts between the Persian people and the ancient Greeks or Romans and through Greek and Latin found their way to English.
Dying Gaul, or The Capitoline Gaul, [1] a Roman marble copy of a Hellenistic work of the late 3rd century BCE, Capitoline Museums, Rome Assyrian lamassu gate guardian from Khorsabad, c. 800 –721 BCE Michelangelo's Moses, (c. 1513–1515), San Pietro in Vincoli, Rome, for the tomb of Pope Julius II Netsuke of tigress with two cubs, mid-19th-century Japan, ivory with shell inlay The Angel of ...
Travertine (/ ˈtrævərtiːn / TRAV-ər-teen) [1] is a form of terrestrial limestone deposited around mineral springs, especially hot springs. It often has a fibrous or concentric appearance and exists in white, tan, cream-colored, and rusty varieties. [2][3] It is formed by a process of rapid precipitation of calcium carbonate, often at the ...