Search results
Results from the WOW.Com Content Network
Azurite is a basic compound that is coordinated with copper. [1] Azurite was popular due to its stability in various light and atmospheric conditions, making it easy to store. [1] Although azurite is permanent in oil and tempura paint, it is darkened when exposed to sulfur; this can be seen in mural paintings that use azurite.
Azurite or Azure spar [5]: 14 is a soft, deep-blue copper mineral produced by weathering of copper ore deposits. During the early 19th century, it was also known as chessylite , after the type locality at Chessy-les-Mines near Lyon , France . [ 3 ]
Verdigris or Vert-de-Gris, is a blue-green, copper-based pigment. Its name comes from the natural pigments that form a patina on copper, bronze, and brass as it ages. [2] The most famous example is the green patina that formed on the Statue of Liberty in New York Harbor.
Plant spirals can be seen in phyllotaxis, the arrangement of leaves on a stem, and in the arrangement (parastichy [53]) of other parts as in composite flower heads and seed heads like the sunflower or fruit structures like the pineapple [15] [54]: 337 and snake fruit, as well as in the pattern of scales in pine cones, where multiple spirals run ...
Diluted light blue, though, is used to describe the color of fine-textured Egyptian blue that has a large amount of glass formed in its composition, which masks the blue color, and gives it a diluted appearance. It depends on the level of alkali added to the mixture, so with more alkali, more glass formed, and the more diluted the appearance. [13]
A desert rose is an intricate rose-like formation of crystal clusters of gypsum or baryte, which include abundant sand grains. [1] The "petals" are crystals flattened on the c axis, fanning open in radiating clusters. The rosette crystal habit tends to occur when the crystals form in arid sandy conditions, [1] such as the evaporation of a ...
Chinese pigments is similar to Western gouache paint in that it contains more glue than watercolours, but more so than gouache. The high glue content makes the pigment bind better to Chinese paper and silk as well as enabling works of art to survive the wet-mounting process of Chinese hanging scroll mountings without smudging or bleeding.
The sand leek is a perennial plant with an egg-shaped bulb. The plant produces two to five unstalked leaves, the bases of which are sheath-like. Each leaf blade is linear, 7–20 millimetres (1 ⁄ 4 – 3 ⁄ 4 in) wide, [10] flat with a slight keel, an entire margin and parallel veins. The edges of the leaf and the central vein are rough to ...