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Prasiolite (also known as green quartz, green amethyst or vermarine) is a green variety of quartz. Since 1950, almost all natural prasiolite has come from a small Brazilian mine, [citation needed] but it has also been mined in the Lower Silesia region of Poland. Naturally occurring prasiolite has also been found in the Thunder Bay area of ...
Chumash Painted Cave State Historic Park is a unit in the state park system of California, United States, preserving a small sandstone cave adorned with rock art attributed to the Chumash people. Adjoining the small community of Painted Cave , the site is located about 2 miles (3.2 km) north of California State Route 154 and 11 miles (18 km ...
The art of the Upper Paleolithic represents the oldest form of prehistoric art. Figurative art is present in Europe and Southeast Asia , beginning around 50,000 years ago. [ 1 ] [ 2 ] [ 3 ] Non-figurative cave paintings , consisting of hand stencils and simple geometric shapes, are somewhat older, at least 40,000 years old, and possibly as old ...
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Hardstone carving, in art history and archaeology, is the artistic carving of semi-precious stones (and sometimes gemstones), such as jade, rock crystal (clear quartz), agate, onyx, jasper, serpentinite, or carnelian, and for objects made in this way. [1] [2] Normally the objects are small, and the category overlaps with both jewellery and ...
One of the earliest examples of artificial stone was Coade stone (originally called Lithodipyra), a ceramic created by Eleanor Coade (1733–1821), and produced from 1769 to 1833. Later, in 1844, Frederick Ransome created a Patent Siliceous Stone, which comprised sand and powdered flint in an alkaline solution. [ 1 ]
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