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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 .
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 ...
The following is a list of significant artworks by the American artist Jean-Michel Basquiat (1960–1988), who played a historic role in the rise of street art and neo-expressionism. During his short yet productive career, Basquiat created more than 600 paintings and 1,500 drawings. [1] He started creating sculptures and mixed media works in 1979.
The Gravettian spans the Last Glacial Maximum, ca. 33–21 kya.The Solutrean (c. 22–17 kya) may or may not be included as the final phase of the Gravettian.. Numerous Venus figurines [6] from the Gravettian have been found including: Venus of Dolní Věstonice, Venus of Brassempouy, Venus of Laussel, Venus of Lespugue, Venus of Moravany, Venus of Galgenberg, Venus of Petřkovice, Venus of ...
Egyptian faience is a non-clay based ceramic composed of crushed quartz or sand, with small amounts of calcite lime and a mixture of alkalis, displaying surface vitrification due to the soda lime silica glaze often containing copper pigments to create a bright blue-green luster. [7]
One of the most well known examples of terrazzo flooring is the Hollywood Walk of Fame. Terrazzo is a composite material, poured in place or precast, which is used for floor and wall treatments. It consists of chips of marble , quartz , granite , glass , or other suitable material, poured with a cementitious binder (for chemical binding ...
A US defense agent scanning in architectural documents. Architectural reprography, the reprography of architectural drawings, covers a variety of technologies, media, and supports typically used to make multiple copies of original technical drawings and related records created by architects, landscape architects, engineers, surveyors, mapmakers and other professionals in building and ...
After crystallization the dominant crystal phase in this type of glass-ceramic is a high-quartz solid solution (HQ s.s.). If the glass-ceramic is subjected to a more intense heat treatment, this HQ s.s. transforms into a keatite-solid solution (K s.s., sometimes wrongly named as beta-spodumene). This transition is non-reversible and ...