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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 ...
Georgia O'Keeffe, Drawing XIII, 1915, charcoal on paper, 24 3/8 x 18 1/2 in. (61.9 x 47 cm), Metropolitan Museum of Art. Drawing XIII is an example of how O'Keeffe began to develop her own sense of design and composition. A rising flame or flowing river are suggested by the curved line on the right side of the drawing.
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 ...
Miniature rock art of the stencilled variety at a rock shelter known as Yilbilinji, in the Limmen National Park in the Northern Territory, is one of only three known examples of such art. Usually stencilled art is life-size, using body parts as the stencil, but the 17 images of designs of human figures, boomerangs , animals such as crabs and ...
The oldest firmly dated rock-art painting in Australia is a charcoal drawing on a rock fragment found during the excavation of the Nawarla Gabarnmang rock shelter in south western Arnhem Land in the Northern Territory. Dated at 28,000 years, it is one of the oldest known pieces of rock art on Earth with a confirmed date.
Women in Native American communities have been producing art intertwined with spirituality, life, and beauty for centuries. Women have worked to produce traditional art, passing these crafts down generation by generation, as well as contemporary art in the form of photography, printmaking, and performance art. [1]
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 ...
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 ...