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The writing slate consisted of a piece of slate, typically either 4x6 inches or 7x10 inches, encased in a wooden frame. [1] Split slate was prepared by scraping with a steel edge, grinding with a flat stone and, finally, polishing with a mix of slate powder in water. Pencils were of a softer stone, such as shale, chalk or soapstone. [2]
Slate is mainly composed of the minerals quartz, illite, and chlorite, which account for up to 95% of its composition. The most important accessory minerals are iron oxides (such as hematite and magnetite), iron sulfides (such as pyrite), and carbonate minerals.
Long's Whitechapel Slate Circle (1981) brought a record price for the artist in 1989 when it sold for $209,000 at Sotheby's in New York. At another auction in 1992, the piece was estimated far more modestly at $120,000 to $160,000, but bidding never exceeded $110,000; [ 19 ] instead, the National Gallery of Art , Washington, D.C. purchased it ...
Today argillite carvings are sold in galleries and fine art stores and take on more traditional Haida forms. Haida artists have been carving the black slate of the island of Haida Gwaii for several hundred years. From its conception, the art has depicted a variety of images, from traditional Haida forms, to Western figures.
A chalkboard with an eraser in the chalk tray. A blackboard can simply be a board painted with a dark matte paint (usually black, occasionally dark green). [1] Matte black plastic sign material (known as closed-cell PVC foamboard) is also used to create custom chalkboard art. [2]
Serekhs bearing the rebus symbols n'r (catfish) and mr (chisel) inside, being the phonetic representation of Narmer's name [16]. The Narmer Palette is a 63-centimetre-tall (25 in) by 42-centimetre-wide (17 in), shield-shaped, ceremonial palette, carved from a single piece of flat, soft dark gray-green greywacke. [14]
With budget cuts and shifting policies surrounding in-school arts education on the forefront of everyone’s mind and seemingly every politician’s political agenda, the importance and necessity ...
The copying of an original statue in stone, which was very important for Ancient Greek statues, which are nearly all known from copies, was traditionally achieved by "pointing", along with more freehand methods. Pointing involved setting up a grid of string squares on a wooden frame surrounding the original, and then measuring the position on ...